Originally Posted by Zulfiqar

this sensor is at the back of the compressor usually.

The sensors would be similar across the range of cars - I bought a compressor clutch assy for my w124 too, it was sold on ebay as S500 compressor clutch unused.. I paid 40 bucks for it and its a perfect fit - same part no too.

You can try the jyard for it. It usually is good for a long time. Most people have had klima relay or other problems.