Another fine job. You really are a jack of all trades - engine work, interior repair, wiring, etc.
I am considering doing this install in my W124, and have a question:
What is that valet switch for? I see that it is called the programmable button, too, as it used for programming the unit, but what "valet" function does it serve?
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".