My 1995 S420 drivers seat will not adjust (up and down) with me sitting in the seat..... It will move up and down if I'm standing outside and adjust the seat before sitting down.

Has anyone solved the W140 seat problems that were caused by broken plastic gear parts? Replacement for the commonly broken gears were not availble 2 years ago when I purchased the car from a MB dealer. At that time the seat mechanism was replaced by the dealer prior to my buying the car. This replacement is now having the same trouble as the first one.

Any advise or knowledge will be appreciated.

Did anyone consider getting spare parts hand made by a machinist, and have extras left over ?

DanielW