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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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SLK230 1999. Went out to start it and battery was completely

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SLK230 1999. Went out to start it and battery was completely flat. When I put the booster pack on a lot of things under the bonnet started making noises and all the dash lights lit up. Key was not in the switch at this time. Changed the K40 relay and this made no difference.
Customer: replied 2 years ago.
Still waiting on an answer to the above question.
Hello, welcome. My name is***** will do my very best to assist you with your question. I apologize if you have been waiting long for a response. From what you are describing the issue that you are having is failed alternator, the alternator has failed internally and is over charging. The alternator will need to be replaced.
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