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#1
11-02-2010, 06:38 PM
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126 left real lower control arm
I recently bought a 126 300SD for my daughter. Looking thru the records I see that the left rear lower control arm had been replaced. Asked the PO what happened. He said it just broke when he was driving so he had it replaced. I looked at one other 126 SD before purchasing this one. The left rear lower control arm was broken on that one also. It had rusted thru. I looked closely at the underside of that car. There was no evidence of any other rust.
What's the deal with these left rear lower control arms? Just a fluke that I've only looked at 2 and both had broken arms? Was there a design problem?
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 
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#2
11-02-2010, 06:48 PM
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Maybe it was a fluke... mine's just fine. I haven't heard of any design flaws on this respect. The cruise control however...
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[/SIGPIC]~cirrusman 1983 Mercedes Benz 300SD - Wife calls him "Chitty Chitty Bang Bang" [SIGPIC] 1983 Toyota Tercel (Tommy, The little Toyota that could) 1965 Ford F100 (Grandma Ford) 2005 Toyota Sienna (Elsa, Wife's ride) Gone: 1988 Toyota Pickup 2004 Subaru Outback 1987 Cadillac Fleetwood Brougham 1986 Volvo 740 GL Station Wagon - Piece of junk. 1981 Volvo 242 DL 2 Door - Hated to see it go. R.I.P.  1987 Pontiac Fiero GT
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#4
11-02-2010, 09:23 PM
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odd, verry odd... none of mine have any rust on the rear control arms...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#5
11-02-2010, 10:24 PM
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It was very odd. There was no rust anywhere on any body panel. No rust around the jack points. No visible rust underneath on the chassis. The only visible rust was directly at the spot that the control arm broke about 6-8" inboard of the wheel. Even the exterior surface of the broken control arm had no rust on it. While I did not have a lift or a jack when I was looking at it, I did crawl underneath pretty far. I'm pretty sure that control arm rusted through from the inside out. I think if someone had looked at it prior to it breaking, they would not have suspected any rust problems.
When the seller told me that the car had a broken control arm I assumed that someone had hit a curb hard or the car had come from the rustbelt. But there was no evidence the car had ever been driven on salted roads. It looked like other Colorado cars.
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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