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  #1  
Old 09-13-2005, 12:21 AM
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Join Date: Sep 2005
Location: Taos, NM
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'83 240D Instrument cluster oil leak

Hi all,
I am new to this site but not new to mechanical things. My situation is my 1983 240D has an oil leak coming out of the instrument cluster. The oil tube going to the oil pressure gauge isn't leaking outside of the cluster. The oil is inside coming out the bottom of the cluster and traveling down the steering column onto the brake pedal. I haven't taken the cluster out yet. I have reached up and tightened the 10mm nut of the oil pipe going into the cluster but no luck. Does this pipe continue to the gauge? (Stupid question), but the reason I ask is that I want to order the right part, so does the oil pipe continue into the cluster or is there something inside the cluster that needs replacing?

Also, who do you all order parts from? I have a local Mercedes aficionado here in Taos, NM but would like to order direct from a parts place. I have used the Benz Bin and Mercedesource and one other I can't remember right now.

Thanks all, great site. Love to read all the posts,
Ted
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Old 09-13-2005, 12:26 AM
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Join Date: Aug 2002
Location: NE Okla
Posts: 1,104
Have not had a W123 dash apart, but the mechanical gauges used on pre 85's can and do get stress cracks in the bourdon tube. Sounds like this is your leak source. Might try to get a better one from a car in a junk yard. Be careful to use two wrenches when unhooking the gauge from the line and when reconnecting in your car. Also, do not start the engine with the line disconnected from the gauge!!!
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  #3  
Old 09-13-2005, 10:18 AM
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That's a somewhat common problem. It happened to me not too long ago. Here was my post:
[URL=http://www.peachparts.com/shopforum/showthread.php?t=128305[/URL]

Good Luck.

Scott
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1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)
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  #4  
Old 09-13-2005, 10:44 AM
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Join Date: Feb 2001
Location: Canton,Texas
Posts: 987
Look for an instrument cluster on Ebay or in a junk yard. I took the oil, water, and fuel part out of the new one I got which was from a 78 240D and everything worked fine on my 300D. The little cap thing in the middle of it is silver and the temp reads in F instead of C but it works fine.
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Old 09-14-2005, 07:26 PM
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Location: NW WA
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If you have a wrecking yard any where near you should be able to pick up a couple of complete instrument panels for under $50.I bought one recently off eBay for $20 and have all the rest of the stuff for spars, Its an easy swap.
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  #7  
Old 09-15-2005, 10:38 AM
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Location: Weston, FL
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I got my used gauge for $12. Just shop around. Also, you can always just block off the line and not worry about the oil gauge.

Scott
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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)
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