W126 Becker Radio install – part 4

Previously, I had installed a Becker Mexico 1402 Cassette in my 1987 560SEC. This is a very similar model to what it left the factory with. My setup looked factory, but was running a hidden Bluetooth FM injector, amplifier and USB charging ports.

After driving around for a few weeks, I realised I needed to make a few changes. Overall, I was really happy with the system, except for the following:

USB charging ports were no longer working Distortion in music with strong midrange at medium to high volume The radio worked at position 1 of the ignition switch, but […]