Actually it is not he lock mechanism as it is the sensor that is red when it locks and green when it unlocks. It does not seem to locate the "signal" from the key unit anymore.

Where would I find out how to remove and replace this??

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Norm K.
'97 E420 Sport
'06 E350 Sedan
'67 Mustang Coupe
'70 F-250
'15 VW Jetta