- Engine / equipment
- 7G-Tronic automatic gearbox (722.9) in the C, E, S-Class, ML, GL, SLK, Sprinter…
- Period mentioned
- 2004 onwards (more failures in 2004–2008)
- Symptoms
- Gearbox stuck in 2nd or 3rd (limp mode), harsh shifts, delay engaging D or R, gearbox warning often without an engine light; turning off and restarting clears it for a while.
- Possible cause described
- The conductor plate (the control unit with built-in speed sensors) fails from heat and vibration. Oil leaks through the 13-pin connector are also common.
- Check for the garage
- Diagnose with Xentry/STAR to see the sub-codes (a basic reader only shows P0700). Check for oil in the gearbox connector.
- Cost cited in the source
- Approx. €1,400–2,800 (estimate)A rough figure from the original database, not an up-to-date quote.
KNOWN FAULT · Mercedes-Benz
7G-Tronic conductor plate
Sources are not verified in real time and no entry confirms that your car is affected.
Has this happened to you?
Anonymous answer, no personal data.
Frequently asked questions
How much does it cost to repair this fault?
Approx. €1,400–2,800 (estimate)
A rough figure from the original database, not an up-to-date quote.
Calculate estimateHow is it checked?
Diagnose with Xentry/STAR to see the sub-codes (a basic reader only shows P0700). Check for oil in the gearbox connector.
What are the symptoms?
Gearbox stuck in 2nd or 3rd (limp mode), harsh shifts, delay engaging D or R, gearbox warning often without an engine light; turning off and restarting clears it for a while.
Which cars and years does it affect?
- Brands
- Mercedes-Benz
- Engine / equipment
- 7G-Tronic automatic gearbox (722.9) in the C, E, S-Class, ML, GL, SLK, Sprinter…
- Period mentioned
- 2004 onwards (more failures in 2004–2008)
Taking it to a garage?
Models with this entry
- Mercedes-Benz Clase C (W203)2000–2007
- Mercedes-Benz Clase C (W204)2007–2014
- Mercedes-Benz Clase C (W205)2014–2021
- Mercedes-Benz Clase E (W211)2002–2009
- Mercedes-Benz Clase E (W212)2009–2016
- Mercedes-Benz CLK (W209)2002–2009
- Mercedes-Benz CLS (C219)2004–2010
- Mercedes-Benz CLS (C218)2011–2018
- Mercedes-Benz Clase S (W221)2005–2013
- Mercedes-Benz Clase S (W222)2013–2020
- Mercedes-Benz SLK (R171)2004–2011
- Mercedes-Benz SLK (R172)2011–2016
Other entries for these makes
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- Dual-clutch gearbox and cam adjusters on the SLS AMGMercedes-Benz
- 7G-DCT gearbox and campaigns on the CLA, GLA and GLB (from 2019)Mercedes-Benz
- Mercedes-Benz Clase A (W176): known faults of the gearbox and transmission according to L'argusMercedes-Benz
- Chain, injectors and coolant leaksMercedes-Benz · Jeep
- Oil cooler and injector leaksMercedes-Benz · Chrysler · Jeep
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