PeachParts Mercedes-Benz Forum - View Single Post

muleears · #6 12-04-2010, 03:42 PM

Well I have done a little more investigation and here is what I have found. I plugged the pump into my mity-vac to see what it could do. I plugged in the power, it came on and pulled and maintained a 14" vacuum, after 30 seconds or so the pump stopped on its own. I then drew a vacuum on the locks. The two right side doors locked at about 8", I continued to pump it up to 15" and left it. It maintained the vacuum at 15" for about 30 min. until I unplugged it. The drivers door didn't lock, but it has no vacuum mechanism it is key only operated and it is the switch for the other locks. The drivers side rear door didn't lock either but it is very difficult to operate by hand, apparently something is binding. Next I tried to operate the locks via the key. Nothing happened, the pump didn't come on, nothing locked or unlocked.

So from my investigation I have concluded (correct me if I am wrong) that the pump appears to be OK, at least for vacuum, the "switch" in the door lock seems to not work, the system held vacuum sufficient to work properly.

Remaining questions: I have not had the pump come on and provide pressure. It's my understanding that this is how it unlocks. How do I check the "switch" on the drivers door? I need to get to the mechanism on the rear drivers side door to see what makes that lock so stiff.

Any help on where I go from here would be appreciated.