On engines built between July and September 2015 the supplier made a mistake in the welding process, so the weld seam on the camshaft is not as it should be.
Applies to the engine M274DE20AL.
2014–. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

M 93 / CC BY-SA 3.0 de
What to watch for
The list covers the generation, the engines and the transmissions. Once you pick the version, only the faults that apply to it stay.
On engines built between July and September 2015 the supplier made a mistake in the welding process, so the weld seam on the camshaft is not as it should be.
Applies to the engine M274DE20AL.
The chain tensioner seal starts to leak and engine oil can drip onto the exhaust system.
Applies to the engine OM651DE22LA.
The sealing ring of the chain tensioner starts to let through, and engine oil escapes at the tensioner.
Applies to the engine OM651DE22LA.
On the OM654 and OM656 diesels the maker started a recall over the vacuum controlled coolant pump (maker action code: 2090008).
Applies to the engine OM654.
The Mercedes OM651 common rail diesel has two faults that are independent of each other.
Applies to the engine OM651DE22LA.
On the 2.0 turbo four cylinder (M274, and the transverse M270) the control valve of the crankcase ventilation system fails early.
Applies to the engine M274DE20AL.
In the Mercedes 7 speed 722.9 automatic (7G-Tronic / 7G-Tronic Plus) the mechatronics unit and the conductor plate (Leiterplatte) age over time: jerking on shifts, delayed engagement, a "Getriebe schützen" message, and fault codes on the gearbox electronics.
Applies to the transmission MB7229.
The Stuttgart public prosecutor investigated the OM651 diesel on suspicion of an illegal defeat device (Abschalteinrichtung): the engine management returns better emission figures on the test bench than in real use.
Applies to the engine OM651DE22LA.
2 more faults belong to this generation. On the version page, only the ones that apply stay.
The manufacturer fixes these for free at a franchised dealer. Ask with the VIN whether it was done. The list covers the whole generation. We did not filter it by model year. Some apply only to a narrower production window.
A12/00013/19Safety recallInjuriesno date · EU Safety GateA solenoid valve in the brake fluid circuit could jam. Consequently, brake fluid would outflow to the ABS storage chamber. This might impair the braking capacity of the vehicle, as well as the functioning of the ABS and ESP, increasing the risk of accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00095/19Safety recallInjuriesno date · EU Safety GateThe upholstery of the headrests may become detached. This could increase the risk of injury in the event of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00215/20Safety recallInjuriesno date · EU Safety GateThe head restraints may be defective. This may impair their protective function, increasing the risk of injury in the event of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00238/20Safety recallInjuriesno date · EU Safety GateThe headrests and headrest fixing rods in the rear of the vehicle may be defective. This will impair their protective function, increasing the risk of injury in the event of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00382/23Safety recallInjuriesno date · EU Safety GateThe drainage pipe for the fuel filter can rub against the underbody panel while driving. This can lead to diesel leakage, creating a risk of accidents, injuries. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00774/21Safety recallInjuriesno date · EU Safety GateThe bolted connection of the center support to the roof rail may become loose. As a result, the roof load could become detached while the vehicle is in motion or in the event of a crash, leading to increased risk of injury and posing a threat to other road users.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00821/21Safety recallInjuriesno date · EU Safety GateA brake caliper bracket on the front axle is not sufficiently stable. This may lead to reduced service brake performance, increasing the risk of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00826/22Safety recallFireno date · EU Safety GateThe coolant pump, which is controlled via vacuum, may have a leak between the coolant and vacuum circuits so the coolant may enter the vacuum circuit. If the electric switchover valves are exposed to coolant, due to an electrochemical reaction, this can lead to a continuous increase in the temperature of the component part, which could cause fire. The product does not comply with the requirements laid down in the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technicalunits intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00838/20Safety recallInjuriesno date · EU Safety GateThe fuel return line may be damaged by contact with the underbody panelling. As a result, fuel may leak onto the road, posing a risk to the following traffic.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/01042/22Safety recallFire, Injuriesno date · EU Safety GateThe controllable coolant pump may have a leak between the coolant and vacuum circuit via negative pressure and allow coolant to enter it. If the electric switchover valves are exposed to coolant, a continuous increase in the component part temperature may occur and cause fire. In addition, the brake booster may become damaged over time and reduce brake performance that could lead to an accident. The product does not comply with the requirements laid down in the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/01072/22Safety recallInjuriesno date · EU Safety GateA coding of a control unit may not match the individual vehicle equipment so that the affected control units may malfunction. As a result, some functions of the electronic stability program control unit may not be fully available, thus changing the braking and control behavior, increasing the risk of an accident. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/01121/20Safety recallInjuriesno date · EU Safety GateThe left-hand side seat frame may not have been tightened with the required torque. This could lead to increased risk of injury in the event of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/01136/21Safety recallInjuriesno date · EU Safety GateDue to inadequate welding, the transverse control arm may break. As a result, the vehicle’s braking and steering capability may be impaired, increasing the risk of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/01278/20Safety recallInjuriesno date · EU Safety GateIncorrect mass values on the vehicle registration certificate may lead to overloading of the vehicle. As a result, the front and rear axles can be damaged.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/01356/21Safety recallInjuriesno date · EU Safety GateDue to a production fault, the functioning of the side airbags may be impaired. This will increase the risk of injury in the event of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/0609/19Safety recallInjuriesno date · EU Safety GateThere is a possibility of red rust corrosion on metallic components of the roof frame reinforcement and the connecting elements in the rear part of the roof bed. This could lead to weakening of the roof structure and thus of the overall stability of the body.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/0622/17Safety recallInjuriesno date · EU Safety GateThe incorrect update of the control units may result in malfunctioning of the airbag control device, the Electronic Stability Programme or the distance control system.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/0629/19Safety recallInjuriesno date · EU Safety GateThe passenger airbag cover on the instrument panel is inadequate. In the event of an accident, the airbag cover could break away, potentially fragmenting and causing injuries.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/0802/18Safety recallInjuriesno date · EU Safety GateComponents are missing from the door handles. The doors could open in the event of a side collision.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1061/17Safety recallInjuriesno date · EU Safety GateMissing welding points on the rear cross-bar may increase the risk of injury for passengers in the event of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1288/18Safety recallInjuriesno date · EU Safety GateA faulty "Passenger Airbag Off" light could lead to a faulty passenger presence detector going unnoticed. In the event of an accident, this could increase the risk of injury for the passenger.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1304/19Safety recallInjuriesno date · EU Safety GateThe screw connections of front swivel seat consoles could be defective. This may lead to an increased risk of injury in the event of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1375/19Safety recallFire, Injuriesno date · EU Safety GateDue to incorrectly fitted brake pipes, brake fluid may leak out. This can result in increased stopping distance and to increased risk of fire due to brake fluid getting into contact with hot components.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1432/17Safety recallInjuriesno date · EU Safety GateA section of one brake line may have a narrowed cross section. This could have an adverse effect on the brake dynamics and driving stability which could increase the risk of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1621/17Safety recallInjuriesno date · EU Safety GateThe retaining rings of the wheel bearings on the front axle may not have been correctly locked into position. This may lead to a wheel being lost.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1735/17Safety recallInjuriesno date · EU Safety GateThe steering column is not sufficiently earthed. As a result, in the event of an electrostatic discharge, the driver's airbag may be triggered when not required. This could cause an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1810/19Safety recallInjuriesno date · EU Safety GateThe user's instruction manual might correspond to a different series and be incorrect or incomplete (in example, missing description of the Active Break Assist or absent warning against installation of rear-facing child seats in the front passenger seat). Consequently, the user could misuse the vehicle, which could lead the Active Break Assist to be incorrectly triggered or a rear-facing child seat to be installed in the front seat, increasing the risk of injuries.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1850/19Safety recallInjuriesno date · EU Safety GateDefective screw fitting may lead to the complete release of the hand control device from the base holder. As a result, the vehicle may not be able to accelerate nor be safely brought to a standstill position by applying the brake pedal, increasing the risk of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1874/17Safety recallInjuriesno date · EU Safety GateThe cabling under the front swivel seats can get caught causing damage to the cabling. This could result in the unintended deployment of the thorax airbag when the seat is rotated causing injuries to the occupant.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
INFO/00131/21Safety recallInjuriesno date · EU Safety GateThe functioning of the emergency call system may in some cases be impaired. The communication module software will be updated on affected vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
SR/00601/25Safety recallInjuriesno date · EU Safety GateThe steering wheel height adjustment may not be correctly fastened. In the case of a frontal crash, the fastening of the steering wheel height adjustment may not withstand the impact. This can have a negative impact on the severity of the driver's injuries in the event of an accident. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
Engines and transmissions in this generation
A fault is often tied to the engine, not to the whole generation. You find the engine code in the registration document.
W447 · 2014–
The fault list opens on the version page.
197 versions
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC Extra long
2019–2024 · V 220 d 4MATIC Extra long
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC Extra long Avantgarde
2019–2024 · V 220 d 4MATIC Extra long Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC Extra long Avantgarde Edition
2019–2024 · V 220 d 4MATIC Extra long Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC Extra long Edition
2019–2024 · V 220 d 4MATIC Extra long Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC long
2019–2024 · V 220 d 4MATIC long
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC long Avantgarde
2019–2024 · V 220 d 4MATIC long Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC long Avantgarde Edition
2019–2024 · V 220 d 4MATIC long Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC long Edition
2019–2024 · V 220 d 4MATIC long Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC long Exclusive
2019–2024 · V 220 d 4MATIC long Exclusive
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC short
2019–2024 · V 220 d 4MATIC short
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC short Avantgarde
2019–2024 · V 220 d 4MATIC short Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC short Avantgarde Edition
2019–2024 · V 220 d 4MATIC short Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d 4MATIC short Edition
2019–2024 · V 220 d 4MATIC short Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d Extra long
2019–2024 · V 220 d Extra long
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d Extra long Avantgarde
2019–2024 · V 220 d Extra long Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d Extra long Avantgarde Edition
2019–2024 · V 220 d Extra long Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d Extra long Edition
2019–2024 · V 220 d Extra long Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d Extra long Style
2024– · V 220 d Extra long Style
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d long
2019–2024 · V 220 d long
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d long Avantgarde
2019–2024 · V 220 d long Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d long Avantgarde Edition
2019–2024 · V 220 d long Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d long Edition
2019–2024 · V 220 d long Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d long Exclusive
2019–2024 · V 220 d long Exclusive
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d long Style
2024– · V 220 d long Style
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d short
2019–2024 · V 220 d short
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d short Avantgarde
2019–2024 · V 220 d short Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d short Avantgarde Edition
2019–2024 · V 220 d short Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d short Edition
2019–2024 · V 220 d short Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 220 d short Style
2024– · V 220 d short Style
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC Extra long
2019–2024 · V 250 d 4MATIC Extra long
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC Extra long Avantgarde
2019–2024 · V 250 d 4MATIC Extra long Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC Extra long Avantgarde Edition
2019–2024 · V 250 d 4MATIC Extra long Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC Extra long Edition
2019–2024 · V 250 d 4MATIC Extra long Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC long
2019–2024 · V 250 d 4MATIC long
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC long Avantgarde
2019–2024 · V 250 d 4MATIC long Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC long Avantgarde Edition
2019–2024 · V 250 d 4MATIC long Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC long Edition
2019–2024 · V 250 d 4MATIC long Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC long Exclusive
2019–2024 · V 250 d 4MATIC long Exclusive
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC short
2019–2024 · V 250 d 4MATIC short
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC short Avantgarde
2019–2024 · V 250 d 4MATIC short Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC short Avantgarde Edition
2019–2024 · V 250 d 4MATIC short Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d 4MATIC short Edition
2019–2024 · V 250 d 4MATIC short Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d Extra long
2019–2024 · V 250 d Extra long
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d Extra long Avantgarde
2019–2024 · V 250 d Extra long Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d Extra long Avantgarde Edition
2019–2024 · V 250 d Extra long Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d Extra long Edition
2019–2024 · V 250 d Extra long Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d Extra long Exclusive
2024– · V 250 d Extra long Exclusive
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d Extra long Style
2024– · V 250 d Extra long Style
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d long
2019–2024 · V 250 d long
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d long Avantgarde
2019–2024 · V 250 d long Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d long Avantgarde Edition
2019–2024 · V 250 d long Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d long Edition
2019–2024 · V 250 d long Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d long Exclusive
2019–2024 · V 250 d long Exclusive
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d long Style
2024– · V 250 d long Style
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d short
2019–2024 · V 250 d short
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d short Avantgarde
2019–2024 · V 250 d short Avantgarde
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d short Avantgarde Edition
2019–2024 · V 250 d short Avantgarde Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d short Edition
2019–2024 · V 250 d short Edition
2.0 l · 1950 cm³
OM654 · MB7250
V 250 d short Style
2024– · V 250 d short Style
2.0 l · 1950 cm³
OM654 · MB7250
V 300 d 4MATIC Extra long
2019–2024 · V 300 d 4MATIC Extra long
Neighbouring generations
W447 (2014-). If the listing is from the changeover year, look at the neighbour too.
Common questions
2014–. The changeover year can fall in two generations. If the listing is from that year, look at the neighbour too.
No. It depends on the engine and the transmission too.
The fault list is.
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.