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Mercedes A Class ECU & Air Mass/Flow Meter
This ECU is a very common fault for the Mercedes A Class, it causes the engine management light to come on and fault code for the Air Mass/Flow Meter to be stored in the ECU’s memory. This fault can cause the engine to run rough and idle poorly, click here for further details.
Mercedes misfiring ECU fault:
This is a very common fault with the VDO ECU (engine ECU) fitted to the E320 and various other models. The problem is with the coil drivers inside the ECU failing thus causing the engine to misfire.
This unit can usually be repaired for around £120
Mercedes 1992 onwards with distributorless ignition systems made by Bosch, Siemens & VDO.
Engine misfires on two cylinders
This is caused a faulty engine ECU that loses its driver signal to part of the ignition coil, this is a very common problem at the moment and affects all models. It is assential that the ignition coils are replaced as the new or repaired engine control unit will blow again if the old coils are left in place.
The VDO unit is a larger metal unit with two multi plugs located at the top
The Bosch & Siemens units are small black & plastic. |
