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  #1  
Old 04-02-2003, 11:15 PM
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Join Date: Mar 2003
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Unhappy Dreaded RUST on W126

I have seen these cars with rust bubbling out under the rear wheelwells, and above the bumper, but mine has a unique spot- just below the rear window. I noticed it starting and happened to look under it, and the whole underside has got scale rust all over the ledge. I'm wondering if anyone else has experienced this & what the heck could have caused it. I can scape it and bondo it, but I'm sure the rear window is going to have to come out, which looks like a real pain.
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  #2  
Old 04-04-2003, 01:42 AM
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Location: Cincinnati, Ohio
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John,

Not uncommon for a car which has a bad rear window seal and bad trunk seal. I've got the same problem on my '83 300SD but since it's the daily banger I'm not worrying about it. The other thing to watch on W126s (at least early ones) is rust on the lower rear control arms where the shock bolts to them. Again, my right rear a-arm on the SD is showing rust so I am going to be replacing it shortly. I will also re-rubber the other side to keep things equal. Probably will also put new shocks all around. The rear is beginning to show signs of needing new ones, so I will treat the front end as well.

Nothing better than a W126 with a fresh suspension.....Except of course a W116 with a fresh suspension!
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  #3  
Old 04-04-2003, 05:19 PM
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Location: Toronto, Canada
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Rustproofing my freinds!!! RUSTPROOFING!

My w126 is soaked in the oil yearly and have no problems whatsoever and the car is driven daily through the snow and everything.
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Old 04-04-2003, 06:30 PM
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What brand of rust proofing do you use/get done ?
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Old 04-11-2003, 01:22 PM
3 MB's and counting!
 
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Location: Toronto, Canada
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KROWN rust control center. Voted best rustproofer in Canada and costed $120 to do the 126 and is a clear type grease...nonwaxless so it gets everywhere into the body cavities.
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  #6  
Old 04-11-2003, 01:46 PM
moedip
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Had the same thing under my rear window on my 560sel. Since the rear window was delaminating on both sides, I chose to have the rear window removed and a new piece of steel welded in. The steel was so rusted that when the rubber was removed about 2/3 of the bottom steel fell off. When you see the rust past the rubber - it is worse under the rubber. Be very careful trying to remove the window. The pros I had wanted to keep the old window but it cracked as they gently tried to remove it. I don't know if old glass is more brittle but it took very little pressure to crack it. The new steel was painted and then I had the rubber and window replaced. Fairly pricey but I wanted the job done right.
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