Mercedes-Benz 722.7

Transmission general data

The 5-speed automatic transmission 722.7 (W5A180) had been used since 1998 until 2005 on vehicles of А-class (A168, А190) with the engine capacity up to 2.0 liters as well as on VANEO (W414) with the same type of engines.

Technical issues and repair guidelines

Before covering 200 thousand kilometers these automatic gearboxes get in repair services for 2 reason

1. The clutch drum К1

Due to construction peculiarities of the 722.7 unit and its valve body (VB), at one of the phases of clogging and aging of the 722.7 electrics transmitted excessive pressure on this pack damages the metal of the drum with the piston or pulls out the closing ring, that leads to slipping and necessity for change of the entire clutch cover K1. Preventive measures include well-timed cleaning of the VB unit, or well-timed change of the TC lock-up clutch after gearbox travels 150-200 thousand kilometers.

2.Valve body electronic plate

For proper diagnostics and repair estimation, it is necessary to obtain error codes. Change of the board sensors or wiring of solenoids demands classification of the specialist and programming capabilities for encoding the plate for VIN of the car. Mercedes electronic boards are sensitive to the water, temperature difference, metal chips in oil. Each time diagnostics detects various causes of abnormal operation. The minor repair helps to delay the preventive repair for several years by means of cleaning\washing of the VB unit, repair of the electric plate with broken sensors. Operation with overheated oil damages the electronic plate extremely fast.