[W126 Coupe] Front seat backrest locking mechanism

[Gary]

hey dick   am i to understand that button on the side of the seat works of a vacuum.  and if so what does it do.  i though you just pressed to move the seat up.

Dick Spellman <spell.yy at verizon.net> wrote:  Hi Jon:

Where you just replaced the seat material and the hoses appear to be 
okay, why not lift the rubber cover on each of the seatback release 
points to see if somehow the nylon plunger underneath is partially 
depressed creating a leak. You could inspect further by using a 
MightyVac on the feed (connection under front of seat) to the seatback 
to see if one or both hold a vacuum (say 12-15 inches, no more). This is 
most likely your problem unless you messed with the electric vacuum 
control valve under the driver's knee bolster (look for a small aluminum 
like dome and it will be warm to the touch) or have a faulty door pin 
switch.

Dick

Jon Pridham wrote:

>
> Hi Everybody,
>
> I recently changed my velour interior to a leather interior. In doing 
> so, i have found that the backrests now no longer lock into place when 
> the engine is running, allowing the backrest to tilt forward without 
> pressing the vacum release button.
>
> I can only presume that there is a fault in the front seats that i 
> have fitted as the system worked on my previous seats.
>
> I have checked all the blue vacum pipework, and all seems in order.
>
> Does anybody have an idea where i should look next to recify the problem?
>
> Thanks,
>
> Jon Pridham
>
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