Installation instructions:
Electrical system for towing hitch
Fig. 4: Plugs
11. Unplug the plug from the tail light (E3) and connect it to the intermediate connector assembly
(X57/1).
12. Connect the two brown ground cables to the vehicle's ground (W6).
Fig. 5: Plugs
13. Unplug the plug from the tail light (E4) and connect it to the intermediate connector assembly
(X57/2).
14. Plug the 2-pin socket housing into the connector assembly (X58/4) (please refer to MB
Service Information!).
W168 A-Klasse
313 120 391 103 - 001 - 01/08
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