Originally Posted by W126Ken_W.Pa

Hi all fellow MBZ car audio enthusiasts.
Nothing makes me more mad and pi$$es me off more than when some car audio "pro" shop, who does not have the proper diagrams, books, or even the technical knowledge necessary to install a stereo system in our kind of unique W124 and W126 body cars, puts in an aftermarket system, and basically totally screws up the rest of the systems in the car, especially the anti-theft system (not to mention other issues).

Many car audio shops literally just "hack up" the wiring harness and , well, basically almost ruin the wiring by trying to install an upgraded car audio system.

I have had cars come in, one 1991 300E in particular, that the install shop actually ran a wire to the trunk and kept the old Becker head unit partially wired up (yes, in the trunk!) JUST TO KEEP THE ALARM FROM GOING OFF!!!!
Need I say, this shop was just horrible! I'm sure they were just fine doing an old Nova or Caddy lol.

I am a recording engineer by trade, and in the past AND present I have owned and worked on several 123's, 124's and 126's, and have done my own installs on audio as well as custom work for others.

I am here to offer my assistance to anyone who is in need , or has any questions about doing an installation by replacing your factory Becker with a newer head unit, upgrading speakers and amps.

Weather you decide to just replace your existing head unit, or decide to replace the whole system, Please shoot me an email.

I personally make some custom wiring harnesses that simply just plug into your factory harness.

No wire cutting, "tapping in" to wires, or splicing PERIOD!
And if you just have any questions, feel free to ask.
I will try my best to answer your questions. {I DO NOT charge for consultation on proper speaker sizes, recommended receivers and outboard gear, and I DO NOT sell new gear, so no worries about someone pushing you into something you may not need!} My main concern is that your Mercedes can be outfitted with a great system, without any permanent modifications, and can be returned to 100% stock if you choose to sell it so future owners are not plagued with wiring gremlins that an under-qualified stereo install shop may have caused.

The benefit of a proper install is, when you sell your car, it can be returned to 100% stock, and your original factory car harness will be UN-CUT and will simply just plug right back into your original factory Becker stereo.

I only do Mercedes W123, W124, and W126 cars.
Feel free to email me with any questions, wiring diagrams, etc to make your install go as smooth as possible.
I also have diagrams available for euro headlight conversions as well.
I am a W124 and W126 owner, and I am more than happy to help with that difficult stereo installation, or just to help by answering your questions.
Thanks !