W124 Becker radio install – part 3

I have been in the process of installing a Becker Grand Prix 1402 in my 1990 300TE. This is the model of radio it came with, although this particular radio is not original to this car. In the first installment, I sourced and tested the Becker 1402 and removed the Sony Xplod. In part two, I wired in the right connectors for the Becker, as well as the iSimple Tranzit BLU HF FM injector. By the end of that installment, I had music from my phone playing through the speakers of the car.

To complete the install of the Becker […]

W124 Becker radio install – part 2

Yesterday, I started installing a Becker 1402 in my 1990 300TE. This was the radio it was sold with, and the same radio I have in my 1987 560SEC. I had removed the old Sony and inspected the wires, plus fixed my broken Hazard light switch.

This morning I looked up the wiring colours for the Sony online. The wiring in the car has been ‘modified’ by various radio installers over the years, so starting with the Sony wires was a good place to start. As outlined the operation instructions, the Becker 1402 wiring harness has four wires going into […]

W124 Becker radio install – part 1

I purchased my 1990 Mercedes 300TE with a modern Sony Xplod CD player. It was a fairly low end model that sounded pretty bad and looks really out of place in the W124 dash. The passengers front speaker was not working, adding to the poor sound. The S124 has very silly speakers in the rear, one of the few design flaws in the vehicle. Losing one of the front speakers is a major blow to sound in the car.

My car was first sold with a Becker Grand Prix 1402. The operating instructions is still in the owner manual kit. […]

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 […]

W126 Becker Radio install – part 3

I am currently in the process of installing a period correct Becker Radio in my 560SEC. In part 2, I had the system up and running. The final task was to tidy up the installation and re-install all the trim.

The first step was to properly organize and tidy up the wiring. I wanted a neat install, and to hide all the wires out of the way. The Alpine amplifier I am using is small enough I could tuck it in with some other control modules in the passengers foot well.

I mounted the amp with the back face up […]

W126 Becker Radio install – part 2

In part 1 of this series, I had begun installing a Becker Mexico 1402 in my 560SEC. I had planned out my install and done the core wiring for the Becker itself. Today, my goal was to complete the wiring of the ancillary components and test the system.

I decided to use two X30 harneses for the install. I had four available plugs on the X30 power block, so it kept it neater if I used two. The main purpose of the first one was to connect my USB ports. I also used one of the ground wires for the […]

W126 Becker Radio install – part 1

My 1987 UK Market 560SEC was originally sold with Becker Mexico Cassette player (option 251). I’ve been planning for a while to re-install a period Becker radio, with a few of my own upgrades.

My first task was to research the radios and purchase a suitable unit. I ended up purchasing two radios, Becker 1402 and Becker 1480. As the skills and parts to repair these radios are getting harder to find, I wanted a primary radio and a backup unit. I am installing the 1402 and will get the 1480 repaired and keep it as the backup. I have […]

Becker 1402 Operation Instructions

I am currently installing a Becker 1402 Grand Prix electronic in my 560SEC. I don’t have the original owners manual packet for the car, so I didn’t have an instruction guide. In any case, since my 560SEC is a UK version, it would have originally had a slightly different Becker that looks visually the same. There were a couple of buttons I wasn’t able to to identify, so I borrowed the instruction manual from a friend with a 1989 420SEL.

The Becker 1402 was standard on the W126 from 1988 in Australia (other than the 560) and at least some […]