Fixing W116 and Early 123 Door Locks

#1 Failure Point are the rubber diaphragms in the door lock actuators

These vacuum door locks are prone to failure because of age, and nothing gets more deterioation that the rubber diaphragms on the acutators themselves.

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Problem & Solution

Common among these chassis:


We have repair parts available along with instructions. Kent will show what part fails and how the new part is made in his free video tip. See related products for other parts and tools you may need to fix your vacuum door locks. 

You will need a vacuum hand pump tester to properly test your actuators for leaks.