Mercedes VDO ECU's being damaged and coil packs melting
Mercedes coil packs above spark plugs with VDO ECU systems. The harness is sometimes the cause, overheating and causing the low tension side of the harness to coils to short. This is damaging both the ECU and melting the coils. It is now possible to replace only the damaged part of the harness, called "pin bushing housing" part number (A)202 540 6081 (takes about 1-2 hours to wire in). If we rebuild this ECU this must be done. This problem is not to be confused with misfiring on all cylinders, which can be cause by a faulty Air Flow Meter.