I have a mercedes c280 and I tried to take out the rocker arm sensor and install a new one. it takes a star type socket. I used the wrong socket and rounded the edges now nothing will take it off. any ideas? I brought it to a shop and they didn't know what to do. they thought of breaking off the sensor but if they can't get it out then it will never start. I picked it up today. I was thinking maybe another shop might be able to do something. any ideas? thanks. it is a tight spot to work in.

What is a rocker arm sensor??

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A Dalton

I mean't crankshaft sensor