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Old 08-08-2009, 12:02 AM
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Join Date: Jun 2008
Location: Connecticut
Posts: 241
300SDL Seat

The Seat back on the driver's side of my 87 SDL has a little play in it and moves when i brake and accelerate. Is there any way i can tighten this up and make it not have so much play? it bothers me and don't really wanna deal with it if i dont have to.


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Old 08-08-2009, 12:30 AM
Join Date: Nov 2001
Location: Cape Cod Massachusetts
Posts: 1,427
SDL Seat Repairs

There are two bolts on each side which hold the seat back to the seat bottom, they are located behind the plastic trim. On the outer side the trim piece would need to be removed. Warning it is easy to break the mounting tabs off the trim piece and once you do it will have a hard time ever staying in place after that. The two bolts are 13 mm and use blue Loctite. On the inner side there is the trim, attached the same way with the same cautions, the seatbelt reciever is also on that side and the trim will need to be manuvered around it.

Unfortunately your problem is probably not where it's attached but likely a part of the hinge steel that is cracked, not common but not unheard of either. Cars that have been hit sometimes have this happen. Could be the hinge internals also, the adjustment is a gear driven shaft and is integral to the hinge.

The best thing to do is try to get a good feel of where things are first, with someone in the rear seat have them try to move the seat back fore and aft, at the same time try to observe the area where the seat back attaches to the seat bottom. If the movement is observed to be basically occuring there you might just have loose bolts. With your assistant moving the seat back if the movement seems to pivot in line with the hinge of above that area you will probably won't have an easy fix unfortunately. You will likely need to get the seat out of the car and get things taken apart to figure out what the problem actually is.

If it's not the bolts you will likely find that a replacement seat back the quickest and least troublesome solution. If you're lucky you might find one the same condition and color if not you can always swap your cover and padding onto a newer back.

The easiest would probably be a complete replacement set if your's is not a simple repair. Good Luck!

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