Autotronic automatic gearbox (CVT 722.8) on the A-Class and B-Class

Sources are not verified in real time and no entry confirms that your car is affected.

Engine / equipment: Autotronic continuously variable transmission (722.8): A-Class W169 and B-Class W245
Period mentioned: 2004–2012
Symptoms: Limp mode, loss of power and a “Transmission: visit workshop” warning; speed-sensor codes (0722, 0793); noises or slipping at high mileage.
Possible cause described: Mainly the speed sensors and the control unit inside the gearbox oil fail; metal particles from infrequent oil changes make it worse. The variator push belt can wear prematurely. Repairing the gearbox rarely pays off because of the cost.
Check for the garage: Read the gearbox codes; change oil and filter on schedule (or earlier); consider repairing the control unit at a specialist before replacing the whole gearbox.
Cost cited in the source: Approx. £500–600 to repair the control unit at a specialist; a new gearbox costs several thousand.A rough figure from the original database, not an up-to-date quote.

Sources from the original database

Gebrauchtwagenberater: Mercedes A-Class W169, typical problems CarWiki: known problems of the Mercedes Clase A ECU Testing: Mercedes A-Class W169 CVT 722.8 transmission ECU problems

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Frequently asked questions

How much does it cost to repair this fault?

Approx. £500–600 to repair the control unit at a specialist; a new gearbox costs several thousand.

A rough figure from the original database, not an up-to-date quote.

Calculate estimate

How is it checked?

Read the gearbox codes; change oil and filter on schedule (or earlier); consider repairing the control unit at a specialist before replacing the whole gearbox.

What are the symptoms?

Limp mode, loss of power and a “Transmission: visit workshop” warning; speed-sensor codes (0722, 0793); noises or slipping at high mileage.

Which cars and years does it affect?

Brands: Mercedes-Benz
Engine / equipment: Autotronic continuously variable transmission (722.8): A-Class W169 and B-Class W245
Period mentioned: 2004–2012

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Models with this entry

Mercedes-Benz Clase A (W169)2004–2012
Mercedes-Benz Clase B (W245)2005–2011

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