W111 poor running issues and becker update

My 250SE has been suffering from poor running issues for almost two years now. It started not long after I got the car back from being repaired from the impact with the Kangaroo. Despite a lot of work to try and rectify these issues, they are still plaguing the car.

The challenge is that these are intermittent problems, and so hard to diagnose. I started by checking the basics – the fuel filter, tank and so on. I also changed the plugs. This had no impact. My mechanic thought it was ignition related, so we’ve changed most of the wear […]

450SLC Becker Mexico Cassette install part 4 – Final installation

I am currently in the process of installing a Becker Mexico Cassette in my 1977 Mercedes 450SLC. In part one, I covered buying and testing the radio. In part two, I covered upgrading the speakers, and in part three I covered the wiring. This part will be all about actually installing everything.

My first task was setting up the control button and microphone for the Tranzit BLU. The control button makes this a truly hands free system. It is used to control the functions of the Tranzit BLU such as accepting calls, hanging up, skipping a track and so on. […]

450SLC Becker Mexico Cassette install part 1 – Preparing the radio

Over the last 12 months or so, I have been focused on getting period correct Becker radios installed in my Classic Mercedes cars. I had never experienced these radios until I purchased my one owner 560SEL back in 2020. It was owning this car that made me realize how well they work in the car. I’ve started to view them as part of the overall experience of owning these cars rather than just a way of getting sound.

Last year I started to source the right radios for the cars I owned. I originally planned to start with my 450SLC, […]

Becker Mexico Cassette 370 Operation Instructions

The Becker Mexico Cassette is the radio most often associated with Mercedes-Benz cars of the 1970s. At least in Australia, it would progressively become standard in the various Mercedes-Benz models until the end of 1978. There were a few different varieties of this radio over the years, the instructions below are from an 370 M series radio, originally fitted to my 1977 450SLC. For 1978 in Australia, the Mexico Cassette moved to the 485 model for that year only.

The Mexico Cassette was always standard on the 450 models, but optional on other cars in the early 70s. At least […]

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. […]

Reinstalling a Becker Mexico cassette in a 1979 450SE

One of my friends in the Mercedes Club recently bought a nice original Mercedes-Benz 450SE. Is a 1979 model in Silver-Green metallic with date leather. It is equipped with a sunroof, which is surprisingly rare on an Australian delivered 450SE. The cars came well equipped with standard leather seats, self-leveling rear suspension, AC, power windows etc. The two features that they surprisingly didn’t have for such an expensive car is the sunroof and rear headrests. Both could be optioned. This car has the colour matched hubcaps that I prefer to the wheels. I was able to drive this car at […]

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 […]