Try this thread - it is for a 94E, but may be similiar ??? Good Luck.
Stereo wiring harness for '94 E320
If they are similar, I would guess
that bundle 1 has a brown ground, a gray/blue illumination, and a black/green permanent power. Do you have a multi-meter to check these out?
[Edited by JCE on 04-02-2001 at 10:58 PM]
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E