[W126 Coupe] klima

[Skorupa]

The KLIMA is the climate control. The fuel pump relay might not be bad if the car runs when wiggled. Symptoms of a bad relay are the car will start but will not run for more than a short while. 
Try cleaning the pins and the plug, and see if that corrects the problem. The relay itself has contacts inside, like those on old distributors, which can also be checked and cleaned. 

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