Hello from Australia. Have an MY2010 ML320CDI that either has a factory fitted or dealer fitted towing hitch. The SAM has a plug in it for the trailer loom.
It is doing some very odd things. When the trailer is hooked up and the vehicle ignition turned on three of the ten LED's in both trailer turn indicators glow dimmly. None of the other lights work when they should. Star Diagnosis shows a fault with the relay for the towing hitch in the rear fuse box. Investigating this I have found that...
W164 mystery trailer wiring issue with SAM
It is doing some very odd things. When the trailer is hooked up and the vehicle ignition turned on three of the ten LED's in both trailer turn indicators glow dimmly. None of the other lights work when they should. Star Diagnosis shows a fault with the relay for the towing hitch in the rear fuse box. Investigating this I have found that...
W164 mystery trailer wiring issue with SAM
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