W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

Driveline or engine noise? Help.

The date is March 12, 2007. I get a strange sort of metallic noise that seems to be temperature aggravated. It seems to be engine RPM related, but I can't be certain. All winter I heard it, most at AM startup. I don't think it goes away at speed but can't hear it over other engine and road noise. It seems load related. At 25 mph in town it could be aggravated by light throttle pressure and sort of disappears on no load with a matched speed and throttle. I live in Fallon, NV, so it was cold. The last couple of days I have been in Blythe, CA, and it has been very warm - about 90.

Chassis Model Number

W126

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Diesel Engine Specific Aid

1969 300SEL won't pass emissions.

The Carbon monoxide was way too high, so I took it to an import specialist and he's saying that I need a new fuel injector pump. It's not the fuel pump, but the injector pump. The mechanic said that these are not very adjustable and I need a new one - which he said costs around $1600. Yikes! Does anyone know any tricks to adjust these so I don't have to buy a new one? Or maybe the problem with the emissions is somewhere else?

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Body and Interior Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

W108 W109

240d impossible start on the coldest day in winter.

So I just replaced my glow plug timer relay with the manual override and everything was working fine until today. I got out of bed to find that the temperature outside was -3f. I cycled the glow plugs for 30-40 seconds and tried to start the car to no avail, not even while holding the glow plug button and pushing the accelerator halfway down. I couldn't get it started and got a ride to school. When I got home at 3:30 I found the block heater and plugged it into an extention cord from my house. I let it do its thing for an hour and then tried to start it again with the same effect. I'm pretty sure the block heater is working because I opened the hood and could hear it making a humming sound.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1981 300D Intermittent Starting Problem

I am currently dealing with a very frustrating starting problem with my 300D. This is the symptom: I turn the key in the ignition and sometimes it will start and sometimes it won’t. If it doesn’t start I proceed to turn the key between the off position and the start position. Eventually it starts, sometimes after doing this once, sometimes after 10 attempts. At the beginning of this problem, I knew nothing about automotive electrical systems, so I thought it was the starter and replaced it with a remanufactured Autolite starter from Kragen/Checker Auto Parts (I know this was probably a bad idea). Well, the problem continued and since I already dropped off my (probably) good Bosch starter for a core refund, it’s too late to go back.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

Adjusting the Idle on a 1981 240D

After doing a valve adjustment my D gear idle seems to be a little low and the engine shakes a little more than it used to. I am pretty sure the adjustment was done properly but for some reason I get a little more shake at idle and I was wondering if anyone knew how to adjust the idleon the 240D 1981 Autotrans mercedes?? Has anyone seen this before?

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

240D Auto Transmission Shifts Prematurely After Valve Adjustment?

I have a 240D 1981 and I recently performed a valve adjustment. The adjustment seems to have gone as planned but when I began driving it I noticed decreased power due to the fact that the tranny was shifting too early on all gears now. I may have 1st of all done the adjustment poorly or may have messed up some vacuum lines to the tranmission shifting system which I don't understand too well. Anyone have any hints?

Forums

Body and Interior Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

W123

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