MrMarsh

Hi Guys. I'm looking for some help to get the doors closing correctly on my W140, 1993 300SE, Irish Model, Right Hand Drive, 3.2, 169,000 miles. I've just bought this car and have noticed that the passenger side rear door closes automatically but not the rest of the doors or the trunk. The trunk grab handle pops out OK and the rear reversing aids work OK too. Any help on this would be greatly appreciated.

brett san diego

http://v12uberalles.com/Closing_Assist_Pump.htm

Brett

6_0_0

As I said in one of other threads I had one door not closing, and it was not pump, but a micro switch that activates "vacuuming" of this particular door. It is located near the lock in each door. And now everything works fine. So it does not have to be the pump yet...

Peter Guenther

600 has an unique issue, of the microswitch failing. The system as designed by MB is over engineered. As you close the door to the first notch, a microswitch sends a closure signal to the pump which starts and puts pressure down the line to the actuator, there are two sensor scenerios, the actuator closes the door and the and the microswitch tells the pump to shut off, parallel to this circuit is a timing cicuit which has a predetermined time to see the micoswitch closure or the pressure sensor. If it does not, in two repeated attempts it diasbles that line. These failures are as follows, the pump due to age slows down and the timeout takes effect, the lock is stiff and it takes more time or pressure for the switch to signal "task complete".
I having gone thru this and about to put in pump #3 decided to take the adjust the pressure device, give the sensor a minor adjustment (one turn or less) and you should get good results.
I thought I knew everything but this is a excellent write up, and always took the easy way. I spoke to the "guys at MB and they concurred " but in no way could they attempt this remedy in anything other than personal cars.
Pulling fuse #9 resets the system but not for long
http://v12uberalles.com/