vinkodex.7G-Tronic (722.9): mechatronics and conductor plate
Typically between 100,000 and 220,000 km. It does not show up on every car.
expensive
severity
between 100,000 and 220,000 km
mileage
1
sources
1 source next to the write-up.
The fault
How you spot it
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.
The repair is typically replacing the mechatronics unit or the conductor plate together with an oil change: not the whole gearbox. The complaint is most common on the longitudinal platforms from around 2005 to 2015 (C/E/ML and the early GLC).
The 9G-Tronic (725.0) is a different design; this applies only to the 7G.
Which model
Who it affects
The card opens the generation, the engine or the transmission.
Engines and transmissions
Transmission
MB7229
vinkodex.Checklist
7G-Tronic (722.9): mechatronics and conductor plate
What you would check for this fault. Take it to the car.
Before you buy
Checklist
What you tick stays on this device only.
Sources
How we know
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.