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  #1  
Old 04-29-2009, 09:57 PM
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How hard is it to replace the rubber strip on rear bumper?

I was rear-ended a few months back in my '72 250 (W114) and am just getting around to replacing the bumper - not a bad dent and just on the right side of the bumper. I bought a new bumper w/o the rubber strip and was just planning on removing the strip from my old bumper and installing it on the new one...

What am I looking at here?

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1984 300D
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1986 560SL
1991 300CE
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Old 04-29-2009, 10:13 PM
t walgamuth's Avatar
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its a friction fit. Take a rubber mallet and start on one end whacking it in a bit at a time. ONce you get the hang of it its simple.
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Old 04-29-2009, 10:17 PM
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I guess it just pulls off the old bumper...??
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1984 300D
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Old 04-30-2009, 06:06 AM
t walgamuth's Avatar
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yes. Its a 123 we are speaking of? If so there is a hard plastic rib which has fingers holding it into the metal bumper. The larger rubber strip fits over the plastic rib, IIRC. You just have to get the rubber the right distance from the end. It wants to be centered and fit under the end sheath of the bumper which bolts to the bodywork.

Getting it centered is a little tricky. I seem to remember having to make a couple of runs at it to get it in the right place.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #5  
Old 04-30-2009, 07:50 AM
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The W114 rubber strip is different from a W123. It is a long, thick, semi-flexible rubber which slides through a channel on the inside of the bumper. It has locking tabs on either end.

Remove the bumper guards and any brackets.

Place the bumper on a pair of saw horses or on a thick blanket on the ground, slather the rubber with soap, work one end out from under the locking tab. You usually need to bend one tab to release its grip. It's been a couple of years since I have replaced one but I believe you can pull it free from the outside.

Clean the rubber with warm soapy water. Clean the receiving channel and slather it with dish soap. Have a spray bottle of soapy water handy. Feed the strip through the locking opening from the inside on one end and work it all the way down to the other side. Tapping the strip with a rubber mallet while you are pulling helps. Try to "push" it more than pulling and you'll find it easier to get it even. You will need to apply the "Slinky" technique working around the bends. Once you have the rubber centered then bend the locks into the rubber.

Figure on 4-6 hours on a bad one, 2-4 on an easy one.

4.6 on the "curse-o-meter", 2.1 on technical skills, 5.7 on the patience meter and 9.8 on the "why did I start this" meter.

Last edited by Mike D; 04-30-2009 at 09:59 AM.
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  #6  
Old 04-30-2009, 09:53 AM
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making sure it is clean and lubed as Mike mentioned is the KEY!

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