Installation instructions:
Electrical system for towing hitch
Socket Pin Assignment
Pin
Circuit
1
Indicator lamp, left-hand side
2
Rear fog lamp
3
Ground (circuit 1-8)
4
Indicator lamp, right-hand side
5
Tail light, right-hand side
6
Stop lamp
7
Tail light, left-hand side
8
Back-up light
9
Constant plus
10
Not assigned
11
Not assigned
12
Not assigned
13
Ground (circuit 9-13)
Note
The rear fog lamp is switched off via the controller.
W168 A-Klasse
313 120 391 103 - 001 - 01/08
Wire Colour
black/white
white
brown/white
black/green
gray/red
black/red
gray/black
green
red/blue
-
-
-
brown
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