E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

300CE Coupe front pass. seat stuck - can't fold it forward

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Old Jul 18, 2009 | 07:20 PM
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optimizer's Avatar
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300CE Coupe front pass. seat stuck - can't fold it forward

Strange thing...

The front seat will fold down ok when the car is not running. But once the car is running, the front seat will lock in the upright position (power functions work).

Looks like the safety mechanism that triggers it to lock is stuck? Anyone know how to get access to this and where I find it? Is the control indeed stuck? I remember that the locking mechanism was controlled via an air-supply..

THx!
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Old Jul 18, 2009 | 09:22 PM
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1990 300ce 24v I6
Yeah, its supposed to lock when the door is closed. You wouldn't want you passenger to go flying into the dash, would you? Open the door and the vacuum lock is off.
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Old Jul 19, 2009 | 08:50 AM
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Correct, but I thought that the car should be in gear to lock the seat? I thought I remember that having the engine running but car in P that the seat was unlocked?

I should just check the driver's side, but I thought that was the case...
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Old Jul 19, 2009 | 10:51 AM
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1990 300ce 24v I6
AFAIK, engine on = locked seats.
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Old Jul 20, 2009 | 10:47 AM
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problem solved and i can't believe i forgot...

engine on and doors closed = seats locked
engine on and any door(s) open = seats unlocked

:-)
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Old Jul 21, 2009 | 11:31 AM
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From: Motor City
95 E320 Cabriolet, 108K
In addition, there's a button by the shoulder that allows you to unlock the seat.
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Old Jul 21, 2009 | 02:10 PM
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1990 300ce
Originally Posted by Kestas
In addition, there's a button by the shoulder that allows you to unlock the seat.
exactly... if you want to flop it forward while it's locked, just push the button on the side of the seat...
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Old Jun 17, 2013 | 10:51 PM
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1991 300ce coupe
1991 300 CE coupe HOW DO I FOLD THE REAR SEATS UP TO ACCOMODATE CHILD'S BOOSTER SEAT

Thanks
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Old Jan 16, 2021 | 08:57 AM
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benny wong's Avatar
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w124 300CE
my seat backrest stuck and can't move forward, the rest of the function all works well. Have tried using my friend's working switch but turn out the same. hence likely is the motor. i wonder anyway to test out really is the motor faulty? and how can i manually adjust the backrest to normal position? at least for me to drive while figure the motor or real problem.


how to take out the motor? or use the test pen to try out whether the wire has power in?

is this the place to manually adjust the seat position?
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