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Discussion Starter #1
Greetings.

I have an ongoing problem with my aircon. On a very hot day the aircon would take a few minutes of driving for the clutch to engage and the aircon to come online. This problem has been getting progressively worse over the last year or so until now, it will not operate at all. I have had the pressure tested and the gas is showing 6 Bar pressure.

I know that this model had problems with the engine bay wiring insulation but that would not account for the delayed action above.

Can anyone help. Roger
 

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I have seen this happen with bad wiring or loose connection in A/C controller. Can you tap on the A/C controller and see if it engages ?
 

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Discussion Starter #5
I ran a 12 volt line to the clutch on the compressor and the aircon now works fine. Looks like that horrible gremlin of the faulty engine wiring loom. I still cannot believe that Mercedes did not recall all of the models supplied with the faulty wiring harness.
 
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