have you checked your fuses ? when you say it works and sometimes doesnt, what are the symptoms ?
more than likely theres a frayed wire to the inner door electrics which after opening or closing the door (opr perhaps rain) becomes loose and results in no eletrical flow
or of course it could be something entirely different, so more details of the problem please
Welwyn Merx Limited is a family run business with genuine passion, dedication and 25 years of experience dealing with Mercedes-Benz and AMG passenger cars. Tel: 01707 395999www.welwynmerx.uk
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