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 inputs that determine if the A/C compressor should not...
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 the system in my 560SEC mostly finished, the A/C...
When purchased, my 560SEC did not have working climate control. Not only did the A/C not work, but the heater had a mind of its own, occasionally bursting in to life and turning on full heat. Curiously for a car that has been in Australia since the early 2000s, the car had not been converted to R134A. My first step was to see if...
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 the clutch shorted. I ended up buying a rebuilt...
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