DIY section - under accessory

http://www.peachparts.com/shopforum/showthread.php?t=142415

It looks like the white connector was an aftermarket-mod for a three wire non-adjustable power antenna with the reds = power, brown = ground, blue-ish = trigger. I can't tell the colors for the other loose pins, but I'd guess they correspond to the black wires on the black connector for moving the factory antenna.

A 3-wire is not a factory radio for these cars. It can work automatically, but you'll need to know how the antenna works.

Also - this is how the factory antenna is supposed to work - notice with the antenna switch in Auto it doesn't go fully up unless you move it:

• Radio or ignition OFF or antenna switch to “retract” = all the way in
• Radio on + switch in auto = 30 cm extension
• Radio on + switch in Max = fully up
• Radio on + some intermediate setting = where I put it.

Colors are not consistent, here's mine:

Mercedes connector in car
• Pin 1: Combined Red and Red/Yellow/White = power
• Pin 2: Blue w/ Gray stripe = trigger
• Pin 3: Brown = Ground
• Pin 4: Empty
• Pin 5: Black = intermediate up (I think, or maybe down, but it may not matter since I think the antenna works by comparing voltages across pins 5 and 6 at the antenna plug. I plugged the black wires from the antenna into pins 5 and 6 and it worked as advertised. Maybe I got lucky, or it doesn’t matter)
• Pin 6: Blue = intermediate down (or up?)
Wires on antenna (no connector, just loose pins, I think I’m missing some sort of pig-tail adapter)
• “Pin 1”: lightish Blue = power
• “Pin 2”: Green w/yellow stripe = trigger
• “Pin 3”: Brown = ground
• “Pin 5”: Black = up, or maybe down
• “Pin 6”: Black = down, or maybe up

See here, also: http://www.peachparts.com/shopforum/showthread.php?t=258172