W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

SPEEDOMETER/ODOMETER FAILURE ON 76 300D

THE ODOMETER AND SPEEDOMETER RECENTLY QUIT WORKING ON MY BENZ. RIGHT BEFORE IT COMPLETELY QUIT, I NOTICED THE NEEDLE FOR THE SPEEDOMETER BOUNCED AROUND ALot, then...nothing. some of the lights, such as glow plug, brake sensor and battery lights still work, but the regular illuminary dash lights do not. I replaced the bulbs, but still no light. Also the old becker radio did not work and i pulled it out, but can't seem to figure out what config. to hook up a cd player. could the radio issue be related to the failures on the instrument cluster?

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Diesel Engine Specific Aid

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Chassis Model Number

W115

350SD: Car shakes heavily at low idle once warmed up.

Hi, My wife has a 350SD (W126 - 1991) with 146k miles. We have had it only for the last 15k miles or so. The car has developed a strong throbbing, low frequency vibration or shaking (the whole car) when stopped at a stop light (for example) after it has been driven for a while and is well warmed up. It is slightly noticeable, but much less severe, when started up from cold. Otherwise, the engine seems to run smoothly and be OK at higher RPMs. I have noticed that the idle speed drops a little from, >6500 to

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Chassis Model Number

W126

starting problem

I have a 76 300D that I am having a strange problem with. Usually the car will start without any problem two or three times, and then it will appear that the battery is too weak to even make the car turn over, although the headlights and other electronics still seem to be at full power. I have had the alternater tested and it seems to be working fine. I took the battery back to Wal-Mart and their machine (as well as AutoZones) found the battery to be good.

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W115

Restoring black plastic door handles

I found out on the net,how to restore your black door handle and mirrors,that overtime armorall has turned white. Good old peanut butter.Apply leave on 5 minutes or longer,and wash off.It lasted so far 4 washing,and 6 weeks. To expensive to try on tires. Makes everyones hands smell good too.Just kidding. Peanut Butter,the oils must be good for plastic,I might try peanut oil. Might be cheaper. Nate in TN P.S. Don't use if you expect someone in your car,with allergy to peanut butter.Be neat if a car jacker was allergic.

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Body and Interior Specific Aid

grease for a window regulator

This is about window regulators, specifically on my 1980 300SD (W116). The drivers side window regulator is broken, and MercedesSource has a new replacement for it, but no instructions available with the new part. After examining the broken regulator, I believe that a lack of grease (or lubricant) on the regulator slides contributed to the failure. Further, my other windows are moving slow or binding up, and I suspect that lack of lube is responsible for that slowness as well. Trouble is, I don't know what grease to use on the regulator mechanism. Grease isn't just grease. It's formulated to work at a certain temperature, under specific conditions, and I'd bet the grease on a window regulator is altogether different than wheel bearing grease, for instance.

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Chassis Model Number

W116

Diesel cigar shaped fuel hose

Hello forum, I have just purchased a 1981 300D - non turbo, 100,000 original miles and I am hoping to run Biodiesel, not svo/wvo. In looking over the fuel lines, my mechanic told me that the thick bloated looking line immediately before the canister fuel filter was that shape as a "damper". I haven't seen any kind of chem resistant hose in that odd shape. Is there a specific replacement for this piece or will other hoses serve the same function? Thanks, Dave

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Chassis Model Number

W123

1975 230 parts help

I bought a decent, very original 230 sedan a couple weeks ago. Overall the car is in pretty good cosmetic condition but the engine needs help. The compression is below the minimum at around 100 to 115 pounds. It does run but it's pretty weak. I've searched online but haven't been able to locate a source for parts to rebuild the lower half. Pistons, rings, bearings seem to be a rare commodity for this engine. Is there a source I've missed or are the parts just difficult to come by?

Chassis Model Number

W115

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