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Question....has anyone ever heard of a 1997 W140 not being able to start using the master key? The other day (because a was planning on valet parking my car at the airport), I wanted to make sure my valet key worked....and it did. I went to start my car with the master key and NADA! The starter turns, but the engine will not turnover. put the valet key in to start it and vroooom...no problem. Prior to this, I never had any problems with the master key. By the way, I only have 1 master key and 1 valet key.

Any thoughts?

Thanx
 

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Master key may need to be replaced. You'd have to look in the actual values for what keys are recognized. I would try a new key.
 
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