Many newer cars have a nice feature where taping the turn signal lever will cause the blinkers to blink 3 times then stop. This is very handy for changing lanes on the highway. Volkswagen created a retrofit kit to add this feature to previous models. Because Mercedes and VW wire their turn signals & hazard light switch the same way adding this retrofit kit to the Mercedes is very easy.
Stuff needed:
- Turn Signal Convenience kit for the A3 Golf, VW part # 000 998 229 , ~$70
- Includes relay (000 953 227 A), relay socket, wiring pigtail, horrible instructions, a zip tie, and some crimp connectors
- Screwdrivers to disassemble the center dash
- Wire strippers
- Soldering iron / solder
- Forceps
First let's look at the wiring diagrams.
For the Gen2 W126, others are probably similar:
The "Komfort Blinker" instructions:
So:
Code:
Pin# | Mercedes Color | VW Add On Color | Komfort Relay Pin
31 | Brown | Brown | 4
15 | Black / Violet | Black / White | 6
49A | Blk / Green / White | Green / White | 8
49R | Black / Green | Green | 5
49L | Black / White | White | 2
Continued...