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 […]

W126 A/C almost blowing cold

My fight with the W126 Air Conditioning system is almost over. When I purchased the car, the A/C worked rather well. After the water pump gave out, it looks like it shorted out the compressor clutch. Changing out the clutch is not much different to changing out the whole compressor, so I sourced a new […]

Further 300SE A/C Troubleshooting

Previously, I had identified that the cause of my A/C problems was the fuse blowing. I have been narrowing down the problem more and more to the compressor clutch. Therefore, I wanted to eliminate everything else as the compressor is every expensive and beyond my skillset. I had already unplugged two other components that are […]

Troubleshooting W126 Climate Control

When I purchased my 300SE, the A/C worked well. I assume the overall Climate Control system did too. I never did test anything more than max A/C as the weather was very hot. Everything seemed fine, except for the little aspirator fan which was noisy. Unfortunately 3 weeks after purchase, the A/C stopped working. I […]