Door Closing Assist Easy fix, W140 S class - Page 2 - PeachParts Mercedes-Benz Forum

Peter Guenther · #1 03-12-2009, 04:39 PM

14 years ago i was going to install a push putton that would break the A+ line, it seemed a little dorky. After replacing pums tweeking the sensitivity works like a charm

JimF · #2 03-13-2009, 12:24 PM

Seems like all have forgotten that it doesn't have to be the pump!

It could be the CAA . . . and if it's bad . . . there's no TRICKS that will fix that problem.

Check MENU #28 to refresh your memory.

macallan18gr · #3 10-08-2010, 10:14 AM

Here is my specific issue and let me know if anyone has a suggestion.

I have a '95 S600 coupe. The closing assist started acting up (not closing passenger side and trunk). Pulling the fuse worked to reset it, but it would then fail after a couple of closures. I read the article and adjusted the solenoid so that the pump now runs for maybe 4 seconds (down from about 9-10 seconds) and everything seems to work fine with the following exception:

When the passenger door is opened, the passenger side windows 'crack' down as normal. When I close the door so that the closing assist pulls the door in, the windows go back up as they should. However, sometimes, when I close the door hard all the way without the closing assist pulling in the door, the windows do not go back up as they are supposed to do. If I open the door again and allow the closing assist to pull the door closed, the windows will then go up as they should. I do not have this problem on the driver side.

Can you suggest what the issue might be?

JimF · #4 10-08-2010, 12:43 PM

Could be similar to my problem w/ '94 S500 Cpe.

The CAA [closing assist actuator] was 'cracked' causing a vacuum leak such that when the door was slammed, the passenger side CA wouldn't work.

Details in Menu#28 on my page: here's a direct link:
http://www.k6jrf.com/MB_Close_Assist.html

BTW, that's how the CAA device "broke". . . people slamming the passenger door.

shahdani · #5 10-15-2011, 03:28 AM

Quote:

Originally Posted by thatsdax

I have a First Year W140 S class with Door Closing Aid. I had some problems with my closing aid but it is now fixed and working properly. I bought a plug and play circuit and in minutes my doors are working perfectly again. Cost was cheap. I would tell you where you can get this circuit to help those with similar problems, but I do not want to advertise or be accused of advertising in the room and have this post pulled. I only want to help those that have closing aid problems as I had. I dreamed of a day some one would come up with a fix for this problem.. And some one has...

Can you tell me what exactly you mean plug and play circuit, pls contact me by this email goldwing1522@yahoo.com

pesposito@cbcatalysts.com · #6 10-25-2018, 04:13 PM

I have a 1997 S600 and the vacuum system works for two or three trunk closures and then I have to pull the fuse and put it back in. Then it works 2 or 3 times again. Doors pretty much always work. Will the plug and play described in this thread work? If so, how do I get it? Thanks