Small update, so having leaving the module connected to the thin purple/red wire on the driver side, it has continued to work without any problems the last couple of days, so touch wood it appears it was infact a 12v line.
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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