PeachParts Mercedes-Benz Forum - View Single Post

MB-Dude · #6 08-09-2007, 11:44 PM

Hmmmm.... It's possible your car system has an additional power amplifier, separate from the radio, that controls your power antenna and front/rear speakers. Question for you - How many cables connect to the rear of your existing unit?

For the Becker 754 and Becker 780 to be completely interchangeable, there can be only 4 cables:
1x Antenna cable
1x 4-Connector cable (red, gray, black, brown wires)
2x Speaker cables

The antenna connection outside the box is not a problem. The small box I refer to is very distinctive and sticks out like a sore thumb, but may be a part of a separate unit in your vehicle.

Bottom line - If your unit looks like the rear of the unit in the E-Bay picture and your unit only has the 4 cables above, they should be interchangeable.

One more thought - There may be yet a fifth wire - a brown wire - that connects to a single spade lug on the radio chassis. This may or may not exist in your setup, but does not effect Becker 754 and Becker 780 interchangability.