Question about 1998 Mercedes-Benz M-Class
I folded down my rear seats, and the middle-rear seat belt is locked, will not retract. It's locked in position. I unscrewed the molding, but cannot access anything at all from the "seat down" position. I brought it to the dealer, and they want $550 to replace the entire seat belt. That seems ridiculous to me. Any thoughts??
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Posted on Jan 02, 2017
Honestly, this is a recurring problem with the c-class. There is a certain range(dependent on how far back a person sets his/her seat), that screws with the computer programming and it loses the synchronization on how far to move it forward/back. The tech most likely already reset the seat parameters to get to work for awhile, but I might be inclined to take it back and let them have another go at it anyway, just to make sure. I don't recall any real repair for this problem, but I do know M-B stopped including this feature for a reason.
Posted on Nov 14, 2008
SOURCE: my seat belt will not retract
Try pulling the belt all the way out--it may have drawn in a twist in the belt. Does the belt have a fairly strong pull-back (by a spring)? If it doesn't, you may have to replace the retract mechanism assembly (broken spring). Hope this helps!
Posted on Mar 19, 2010
SOURCE: My drivers side seat belt
Sounds more as if the retraction spring would not be engaged.
There are two springs in the W140 seatbelt. The comfort spring is engaged during driving when the carkey is in the whole and the belt is fastened. As soon as you either pull out the key or press the button of the belt lock, a second retraction spring comes up and pulls the belt harder. Check this by pulling out the key with the seatbelt on. You must feel how it gets tightened, but I believe you won't.
Either the spring is broken or the electromagentic contact engaging the spring doesn't switch. If you are lucky the latter is due to a contact issue under the respective seat. Check plugs under the seat first.
Posted on Dec 29, 2010
I would consider replacing it as the tensioning mechanism may have become affected. This is a key component which makes the seat belt work in the situation that it is supposed to work.
The cost is around $150.
Posted on Mar 21, 2011
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