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Mercedes-Benz GLA-Class GLA 200 d Business Solution common faults.

2017–2020, SUV, diesel, 136 HP.

The fault list covers: OM651DE22LA engine, MB6MT-MFA transmission.

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3 fault write-ups. All are important. No recall on the list.

If you know the year, pick it. Faults for other years drop out of the list.

Before you buy

Known faults

3 important faults

critical2

OM651: the chain tensioner seal leaks and oil drips onto the exhaust

critical

The chain tensioner seal starts to leak and engine oil can drip onto the exhaust system. On the hot exhaust the oil can ignite.

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The manufacturer issued a recall for it, covering more than 100,000 cars built between February and November 2014. The repair is free under the campaign. The visible signs are oil traces at the back of the engine and a burnt smell.

What to check

  • Look at the back of the engine from underneath: oil traces point at the tensioner seal
  • Smell the engine bay when warm: burnt oil has a telling smell
  • Look at the top of the exhaust: baked-on oil leaves a mark
2 more steps in the write-up

OM651: the sealing ring of the chain tensioner leaks and the chain can loosen

critical

The sealing ring of the chain tensioner starts to let through, and engine oil escapes at the tensioner. The cause is insufficient manufacturing tolerance of the sealing rings. Beyond the loss of oil the chain tensioner can also loosen, and in an extreme case the timing chain comes free, which means engine damage. A separate phenomenon is that on the early OM651 engines a shortcoming of the tensioner let the chain stretch prematurely, which typically caused serious engine damage. The maker revised the tensioner several times, so this mainly affects the older units. The maker issued a recall, for more than 100,000 cars in Germany and for 2,869 cars and 2,579 vans in Austria. The range is the four-cylinder diesel units built between February and November 2014. The classes affected are A, B, C, E, S, V, CLA, GLA, GLK, SLK, CLS, ML, GL, Vito, Viano and Sprinter. It also affects older cars that received a replacement engine or chain tensioner from that period. The repair is replacing the sealing ring, free of charge under the campaign, and takes 1.5 to 2.5 hours of workshop time. The visible sign is an oil trace at the rear of the engine.

What to check

  • Ask whether the recall has been carried out, and ask for the workshop confirmation
  • Start the engine cold and listen for a clacking or rattling noise
  • Listen to the chain on lifting off and on load changes as well
2 more steps in the write-up

expensive1

OM651 2.1/2.2 diesel: Delphi piezo injectors and rear timing chain

expensive

The Mercedes OM651 common rail diesel has two faults that are independent of each other.

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1) Delphi piezo injectors. According to the German technical press the fault affected the two more powerful versions (125 kW / 170 hp and 150 kW / 204 hp). The weaker versions got solenoid injectors and were not affected. The fault could show up as early as around 50,000 km: the engine drops into limp mode, power is limited, and the car can still be driven slowly. Because of supply shortages the maker at first replaced only the failed injector rather than all four, so some owners went back four times. Later they moved to replacing the full set. From spring 2011 every 220 CDI version got solenoid injectors; the 250 CDI kept piezo injectors throughout, in several revised versions.

2) Timing chain. The engine runs on gears plus a short simplex roller chain. Increased chain wear (typically caused by a faulty chain tensioner) shows up occasionally at higher mileage. The replacement is very labour intensive, because the chain sits on the rear of the engine, on the gearbox side. The labour is the bigger part of the bill.

In November 2014 the chain tensioner caused trouble again: it can release, and engine oil can leak. The maker recalled cars built between February and November 2014. If the car falls in that window, check that the campaign was carried out.

The water pump can leak too.

between 50,000 and 250,000 km

What to check

  • Check the power output first: the 125 kW (170 hp) and 150 kW (204 hp) versions are the piezo injector, higher risk group. The weaker ones got solenoid injectors
  • Ask whether the injectors were replaced, and how many: a partial replacement meant repeat workshop visits
  • Listen to the engine on a cold start: rough running, shaking, smoke; limp mode or limited power while driving
4 more steps in the write-up

Checklist

Mercedes-Benz GLA-Class GLA 200 d Business Solution

First what you would check on any car. Then the faults of this model.

Before you buy

Checklist

The printed sheet starts with what you would check on any car. What you tick stays on this device only.

On every car

Ask the owner

Faults of this model

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Engine and transmission

OM651DE22LA · Viano 2.0 CDI BlueEFFICIENCY (4MATIC)

100–150 kW (136–204 HP) · diesel

MB6MT-MFA · 6-speed manual, transverse (Mercedes F-SG 310 / 711.6xx)

manual · 6 speed

Torque limit310 Nm
MakerMercedes-Benz

We built the code from the model and the gear count. The factory sheet does not state it.

Variant data

What is in this version

Factory data

Trim
GLA 200 d Business Solution
Body
SUV
Fuel
diesel
Transmission
manual
Engine size
2143 cc
Power
100 kW (136 HP)
Drive
FWD
Production
2017–2020

Factory service interval

The manufacturer specifies this for this version. Of the mileage and the time, the one that comes first is the one that counts.

  • Air filter

    • 60,000 km or 4 years

  • Cabin (pollen) filter

    • 30,000 km or 2 years

  • Brake fluid change

    • first: 3 years, then 2 years(first change at 3 years, then every two years)

  • Fuel filter, diesel

    • 60,000 km or 2 years
All X156 versions

Information, not an expert opinion

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.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms