1985 300SD front seat removal, box spring replacement. - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 09-01-2009, 03:13 PM Thread Starter
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Date registered: Aug 2009
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1985 300SD front seat removal, box spring replacement.


I had a broken spring on the front driver seat (1985 300SD), found a seat at the junk yard and decided to change the box spring as well as adding some much needed padding...

Following the info I found from other members I used a 1/2 inch rubber mat and also added some "pool noodle" to the new setting. Took me about 5hrs to complete the task, I have absolutely zero experience as a mechanic and I am confident that it can be done in much less time....

The result is spectacular, the seat now feels very firm, much more like current model vehicle.

When I was at it I took some pictures, for two reasons. First I wanted to document the removal which really help me for the re-install. Second I thought that it might be of interest to other member .

So here is my modest contribution:
MobileMe Gallery

Problem I encountered:

1)- I had hard time removing the center screw of the railing, I kept the seat connected to the electrical plugs in order to move the seat and align the center screw with the hole in the frame.

2)- Hard time re-installing the seat in the slider by myself but if you can find someone to help it should be an easy task.


1)- Remove the back seat (more space to maneuver)
2)- Once removed, place a pad or blanket under the seat while working on it. It will prevent scratches.
3)-Take lots of pictures during the tear down, very useful during the installation.
4)- Label the connectors and wires under the seat, they all look alike, making sure they are reinstalled in the right place.
5)- I used 4 inch "pool noodle", easy to install and it give plenty of extra firmness.
6)- I used some rubber garage floor pads to place under the cushion, inexpensive.

All in all, it was a great day, no bolts or screws left over after completion and the electric seat still works...

Hope this help and if I can do it, then anyone can do it, believe me....
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post #2 of 3 (permalink) Old 07-31-2013, 06:06 PM
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Date registered: May 2013
Vehicle: (2) 1985 300SD (1) 2 tank wvo
Location: Virginia
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Aww the pictures are gone..
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post #3 of 3 (permalink) Old 08-01-2013, 01:10 AM
Date registered: Jul 2005
Vehicle: 90 300E, 99 ML430, 00 ML320, 05 E500 4matic Wagon
Location: WI
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