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mike_a_mechanic, Mercedes Mechanic
Category: Mercedes
Satisfied Customers: 5471
Experience:  17 years experience as a auto mechanic, foreign and domestic.5 years running my own repair business.
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Cls 320cdi 2007 went to use car wont start nothing on key battery

Customer Question

Cls 320cdi 2007 went to use car wont start nothing on key battery ok ruled out starter motor any ideas? all other electrics in car ok like dash and radio all working ok
Submitted: 3 years ago.
Category: Mercedes
Expert:  mike_a_mechanic replied 3 years ago.
Hello, welcome. My name is Mike, I will do my very best to assist you with your question. I apologize if you have been waiting long for a response.

What normally causes this issue in these vehicles is the ignition switch fails which prevents a signal to be sent to the starter to turn the engine over. The ignition switch will need to be tested as a first step.
Customer: replied 3 years ago.
Is there anyway to test the ignition switch other than at dealers?
Expert:  mike_a_mechanic replied 3 years ago.
No unfortunately a dealer diagnostic tool will be needed to do this accurately.