W126 Klima Relay

A week or so ago, I diagnosed that the likely cause of my non functional A/C in the 300SE was the W126 Klima relay. The second generation W126 went to a Klima relay to control the A/C compressor.

The W126 Klima relay is more of a control unit than a simple relay. It has multiple […]

W126 A/C no longer cooling

There is an old saying that deaths come in threes. I’ve not had any deaths in the family, but I had the A/C dead in three cars at the same time. The easiest was the A/C in my 450SLC that just needed a re-gas. The W126 A/C has been more problematic. Just as I got […]

M103 Distributor cap and rotor

Today I changed the Distributor cap and rotor in my 1986 300SE. I bought the new cap and rotor about two years ago but only just got around to changing it. Unlike on the earlier engines, the M103 distributor cap is a fiddly job. Instead of sticking upwards, it comes out sideways as it attaches […]

Youtube tips – shifter bushing and rounded bolts

Today I did an engine and transmission oil change on the 300SE. I don’t normally post basic maintenance to this website as it really isn’t that interesting. In this case, I used to tips I learned form MercedesSource videos that really sped up the job. MercedesSource are an online parts vendor, who also make some […]

Mercedes self-leveling rear suspension flush

A common feature of Mercedes cars from the mid 70s through the mid 2000s is the self-leveling rear suspension. This system is standard on the wagons, but was commonly specified on the higher end sedans too. Mercedes-Benz Australia was particularly keen on the system fitting it to coupes and even mid size saloons.

The system […]

W126 Sedan Bonnet Insulation

A few months ago I replaced the under bonnet insulation pad on my 560SEC. This job also needed doing on the 300SE. I purchased both pads at the same time, and finally got a chance to do the second one today. Note, if you’re looking for more information on forums, American sites will refer to […]

End of financial year tyre sales

At least in Australia, by far the best month of the year to buy tyres is June. Both the tyre retailers and manufacturers offer attractive end of financial year sales. Most people don’t realize, but tread wear is not the only reason to replace tyres. As the rubber ages, it hardens. Once the tyres harden […]

300SE Odometer Repair Update

Back in early 2017 I fixed my broken odometer. The 300SE odometer repair was successful, but there were two things I needed to follow up on.

The odometer was reading 10% low. I could hear the gears, especially in cold weather.

In addition, some time after I repaired the odometer, one of the bulbs that […]

W126 Transmission Mount

The motor mounts were changed on the 300SE around six months ago, but there was not time to do the Transmission mount. It was obvious it would need doing from the condition of the motor mounts. In addition, I was feeling some vibration from the drivetrain at various times.

changing the W126 transmission mount is […]

300SE Double relay change

The saga of my non functional A/C is now over. The 300SE is blowing cold air. It would want to after all the parts I had to change to get this far. The final piece of the puzzle was the Klima relay. This relay controls the engagement of the compressor and had burned out when […]