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The problem
A spring within the door lock actuator mechanism snaps causing the locking faults.
It is a common fault on these vehicles for a small spring within the door lock actuator to snap causing the symptoms noted. The original spring within the mechanism is very thinly wound and is constructed from a poor quality steel which will inevitably corrode and the spring will snap. Previously this necessitated the complete replacement of the door lock actuator unit at vast expense, the vehicle manufacture has not altered the spring design / construction over the years so even installing a complete new actuator would only be a temporary solution.
Symptoms of the fault
Door lock jumping up and down quickly, door not locking or only periodically, door lock rattles.
Vehicles affected and compatibility
Mercedes ML Class W163 1997-2005
Some of the models affected:
Mercedes-Benz M-Class W163 ML 230
Mercedes-Benz M-Class W163 ML 270 CDI
Mercedes-Benz M-Class W163 ML 320
Mercedes-Benz M-Class W163 ML 350
Mercedes-Benz M-Class W163 ML 350
Mercedes-Benz M-Class W163 ML 400 CDI
Mercedes-Benz M-Class W163 ML 430
Mercedes-Benz M-Class W163 ML 500
Mercedes-Benz M-Class W163 ML 55 AMG
Some associated part numbers:
A1637302135, A1637302136, A1637201735, A1637301135, A1637302335, A1637301235, A1637201235.
Our solution
Our replacement improved design / material springs allow you to repair the actuator.
Made from high quality Stainless Steel (will not deteriorate over time like springs offered by some others) our improved design thicker wound springs will restore your lock and will not deteriorate over time like the OEM part does, save the cost of a replacement actuator that will just fail again. Produced to the finest tolerances for the perfect fit, thicker wound and reshaped to provide a permanent solution to the locking faults noted above.
