BTW, if you're wiring the side marker to the City Light, the jumper wire is from prong 6 on the euro headlight adapter to side marker wiring harness. On the W201, there are 3 wires going into the 4 pin connector. Open the side marker wiring harnes and the wire that you want to tap into is the one that is all by itself on one side of the harness. Then, when you have your "driving lights" on, the City Light in the main beam will be illuminated.