This Mercedes A Class CVT (Continuously Variable Transmission) ECU is an extremely common problem for the 722.8 transmission.
Common Failure symptoms:
Limp home mode / safe mode
Loss of power
‘Transmission visit workshop’ warning message on dashboard
Transmission warning light on dashboard
Not selecting gears
Sticking in gear
Output speed sensor fault
Speed sensor fault
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![](https://i.ytimg.com/vi/unDccqDEdX0/maxresdefault.jpg)