How to replace the Mercedes W210 door lock actuator?
Now pry out the plastic tab holding the IRE sensor wiring harness to the door (green arrow). Also cut the zip-tie holding the harness to the mounting tab on the left of the door airbag (purple arrow). Pull off the vacuum connection going to the door lock actuator (yellow arrow). Use caution when pulling the vacuum line off.
How does a Mercedes Benz door lock work?
These cars use a vacuum operated system to lock and unlock the doors. The system uses a vacuum pump mounted under the passenger seat to either suck or blow air through lines to each door. At each door, there is a vacuum diaphragm that over time can leak and eventually fail.
When did Mercedes Benz start using vacuum operated locks?
Nowadays, electronics are nearly foolproof and are cheap enough to use in almost any application. Mercedes started using vacuum operated locks sometime in the 1970’s, when modern electronics were still expensive and not quite reliable enough to be used in a system that would be used so frequently.
Now pry out the plastic tab holding the IRE sensor wiring harness to the door (green arrow). Also cut the zip-tie holding the harness to the mounting tab on the left of the door airbag (purple arrow). Pull off the vacuum connection going to the door lock actuator (yellow arrow). Use caution when pulling the vacuum line off.
These cars use a vacuum operated system to lock and unlock the doors. The system uses a vacuum pump mounted under the passenger seat to either suck or blow air through lines to each door. At each door, there is a vacuum diaphragm that over time can leak and eventually fail.
Nowadays, electronics are nearly foolproof and are cheap enough to use in almost any application. Mercedes started using vacuum operated locks sometime in the 1970’s, when modern electronics were still expensive and not quite reliable enough to be used in a system that would be used so frequently.