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Old 11-11-2002, 01:48 AM
pmizell's Avatar
Benz Zealot
Join Date: Jun 2001
Location: Houston, Texas
Posts: 838
300E sagging front seat springs, how to replace?


I recently purchased a new replacement set of box springs and seat cushion for my 300 E's front driver's seat. The current springs are sagging a bit on the left side.

Does anyone have any experience with this job? Is this a DIY job or better left to an upholstery shop?

I'm assuming the top leather has to be removed to accomplish the task since the underneath is cluttered with so much wiring and electronics.


'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi
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Old 11-11-2002, 11:10 AM
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Join Date: Aug 2001
Location: secret
Posts: 3,044
Just from my experience, I would take it to an upholstry shop. A mistake could result in you having to buy a new seatcover!
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Old 11-11-2002, 11:36 AM
MikeTangas's Avatar
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Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
If you are a capable DIYer and have patience this isn't too bad of a job. I just replaced the leather and transferred the seat heater into the replacement leather, without a hitch. Thanks for the "push" Mark Cummings .

It will be easiest to simply remove the seat from the vehicle. Four bolts hold the seat to the floor, a fifth for the seat belt latch track (all 10mm) and a couple electrical connections and the seat lifts right out. The complete assembly isn't too heay but is awkward, be careful not to damage the rear seat. I found it easier to remove the front seat through the rear door on the SEL, the extra room I guess.

Once the seat is out you'll remove the seat back, four bolts (13mm) and two more electrical connections. The seat back bolts are concealed under the plastic covers at the corners. Be careful removing these as they will be brittle with age. Once the seat back is off you have to remove the seat cushion upholstery. I found it easiest to set the seat on the floor and lay down on it, this compresses the springs and provides the needed slack to remove the upholstery from it's track.

When the upholstery is loose from the track, you will remove it and the seat pad, as a unit from the springs. The hard part will be removing the seat box from the motorized track. There are three screws on each side hold the two together. The one in the middle is the hardest to access. The job is easier on manual adjustment seats, but you might be able to use a long set of jumper wires to power the motors while out of the car. I used jumper wires to operate the head rest while the seats were out of the car. I didn't remove the boxes from the tracks, so I can't help further.
Mike Tangas
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Old 11-11-2002, 12:25 PM
Posts: n/a
No DYI !

Take it in to the up. shop. I did my seats in my old cougar last year. They will reinstall the springs and have them reshape the seat with new foam. Probably around $100-150 but well worth it. Remember your sitting in the seat hour each day. make it comfortable. Plus you need special tools to pull and attach those little clips.
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