W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

Tachometer question

Good Morning all, 1983 300CD. This is a new purchase and the TACH and Clock are not working. I purchased the "HOW TO" from you concerning the removal and replacement of the dash and related gauges. First, there is 12 volts to the clock so I have to assume the clock itself is bad. I can live without that ; however, the connection going to the tack show 8.3 volts. My question, is that the correct voltage? It does not change with engine RPMs. Additionally, I am unable to find the Amplifier on the L/inner fenderwell. I wanted to check it but I am unable to locate it ANYWHERE.

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Heater and Tach problem for a 1982 300 CD TD

I found no repair Manuals and/or Diagnostic Guides to diagnose my AC/Heater and Tach problem. My heater does not come on when I want it to come on. Most of the time, nothing. I would press the buttons on the climate control and hear contacts, I would roll the temp setting wheel and hear contacts in AC as well in heating. I have source parts and like to repair it myself. I am willing to do a rebuilt, if possible. The Tach either jump around or does not work or works normally, mostly jumps around. This bothers me

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Tranny Vacuum Dashpot Location for 1980 300D

I am a reletively new owner of a 1980 300D, and learning as I go. I've recently been trouble shooting the lack of heat, which means the vacuum system. I've got heat back, but the tranny feels like it is slipping as it shifts gears. I purchased a transmission daspot, but the car doesn't have one currently installed. Should my 1980 300D have a dashpot? If so, where should it be installed? Your help is appreciated.

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300D Power Loss?!? Uh oh!!!

On my drive in to work in my WVO-powered 1983 300D-T this morning, I had been driving on the freeway for just about 5 minutes or so and all of a sudden the car started losing power! I was worried that the transmission was giving for a moment, since that's been a "watch" item, but the revs didn't shoot up like a typical "flare". The guts just went away and the engine was not spooling up. But the engine didn't quite die... Nervously, I stomped the accelerator for a moment and it seemed to "fight through it" and the power charged back, and right then a curious thing happened... The fuse carrying the tachometer blew out right when the car came back to life as if there was a surge. Related? No?

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Recoding a Becker Grand Prix?????

Hi All, I was working on a Heater motor problem and made the tragic mistake of unpluging the radio while attempting to pull the ACC unit. My MB Tech. Companion said my particular radio was equiped with an anti- theft device that scrambles the radio when unsuspecting dolts like myself disconect them. Has anybody got any advise as to how to restore the settings? Thanks Mike Waine

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1986 300e rear suspension stomping noise

1986 300e 5 spd.(Manual) car starts to sway and jumps on high speed. I thought that the rear shock was going bad so I bought the bilstien HD shocks for the rear and have it installed in a local repair shop close to my home.Its much stable on the freeway. But when I drive the car I hear stomping noise on left rear when driving on bumps or pot holes. It feels like the shocks are so stiff it sounds like dug dug dug dug it feels the rear is falling apart could it be the installation not installed correctly. The noise was not there before. what part is worned out to make this noise.

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What is a safe running temp for a 300cd non turbo?

It started out as running to cold, maybe 60 according to the gauge, so I replaced the t-stat with one rated at 176 (80centigrade) now the heater works much better and the car seems to have more power,but now the gauge is reading around 90. Is 90(centigrade) to hot?I know that modern gas powered cars usually run around 195 or more, but I just dont know what a 30 yr old diesel should be running at. are these cars prone to bad gauges or sending units(79 300cd)? I also noticed that my oil pressure has dropped at idle from 3 bars to 2.25, should I worry about this? any advice is much apprecieated!

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