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#1
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Oil oozing from instrument cluster!
Hi Folks,
I have a super-clean '84 300D Turbo that, as of today, began seeping a black oil from the instrument cluster. One by one, the lights below the tach/speedo/ etc began getting covered by this oil. Eventually, it seeped out onto the steering column. Does anyone have an idea what this could be? I thought that water had leaked from the windshield, but when it began to visibly leak, I touched it and discovered oil... Any assistance would be appreciated!! Thanks Stuart Harris 1984 300D 1980 280GE
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Stuart Harris Memphis, TN 1980 280GE Gelaendewagen (sold) 1984 300D Turbo (sold) 1986 280GE Gelaendewagen (sold) 1995 E420 (sold) 1995 E320 Wagon 1998 E320 Wagon 2006 E350 Wagon |
#2
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I would suspect a direct feed oil gauge tube/connection. Do you know if that's the type gauge you have?
Harry 86 300 SDL |
#3
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Although I own a 116 chassis, I'm fairly certain that your model also has a mechanical Oil Prssure gauge. There is a black very rigid plastic line that runs through the fire wall to the back of the oil pressure gauge at the back of the instrument cluster. Either the plumbing has developed a leak or the receiver for the gauge has.
If that is the problem, you may be able to find another cluster at a salvage yard like Potomac German Auto. You should then be able to transplant the odometer assembly (this all presumes that it wasn't contaminated either).
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S, J.R. Brown 2000 G500 LWB Obsedian Black 2005 Toyota Tacoma Access Cab Off Road Sport 1993 Volvo 240 Sedan Anthracite 1980 450SEL Champange (owned it for 15 years. Great car) 1986 280GE LWB Anthracite (Sold it and kinda wish I hadn't) |
#4
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This may not be related to MB cars at all, but it made for a weird repair. I once repaired a woman's Geo that was leaking transaxle fluid/gear oil out of the speedometer cable. A small carbon seal had ruptured in the transaxle allowing the cable attachment to be filled with oil. The spiral spring cable acted like an axial flow pump and pumped it up to the back of the cluster. It dripped out all over her legs and the drivers side. What a mess that made. The dealership wouldn't touch it.
If it is black oil more than likely it's the pressure gauge. If it's red, it may be another freak cable leak out of the trans. Belive it or Not! |
#5
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I agree that either the feed line for the mechanical pressure gauge, or the gauge itself has failed causing the leak. It is possible it could simply be the fitting needs to be tightened as well.
If you remove the cluster to find the source of the leak, be careful not to pull out too far before disconnecting the oil line. Also, when loosening or tightening the fitting, be sure to use two 10mm wrenches, one to loosen the fitting and the other as a counter on the gauge body. If you don't do that, and there was nothing wrong with the gauge, there will be afterwards.
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Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#6
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i know that the oil pressure guage on some models have an actual oil line leading up to the back of the instrument cluster. if this is worn or the connector is leaking it will make a real mess.
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#7
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I guess this is a common problem, since I installed a CD player in my 80 300sd (sorry for you guys that like originals, I had to take out the Becker Mexico tape player), I have noticed oil dripping all over the top of the CD Player and into my passenger floor. It's not a big problem, but annoying.
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