W126, BENZ AID - COMMON QUESTIONS AND ANSWERS

Synthetic Motor Oil and high-bypass secondary oil filters?

I have seen the stickers on peoples' cars and read extensively why I should buy the products. I am wondering if anyone else has feedback or firsthand experience using synthetic oils (ie. Amsoil) along with the high-bypass filter on gas or diesel engines? Please ask if you need more information to answer the question. I am thinking proactively towards - theoretically - extending the engine life even further. I would use the secondary high-bypass filtering and oil condition monitoring to watch for metals/chemical imbalances present as the engine hours and miles continue to accrue.

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Questions and Answers

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Body and Interior Specific Aid

Dash lights not working

Hi I have a 82 240d and the lights on the dash board wont work. When I turn on the switch, the light will come on that lights up the transmission but the dash stays dark. Because none of the lights come on in the dash, I assume that a circut is broken, and I was wondering how I would troubleshoot it. Also I would like to know how to replace the lights just in case it turns out that they all burnt out. Thanks.

Chassis Model Number

W123

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Body and Interior Specific Aid

clunk clunk when tranny downshifts when not under load

I have an 81 300sd with 334,000 on it. Have changed the flex plates and recently had the driver's side rear wheel bearing looked at because i was experiencing a clunk when i put the car in reverse. The mechanic said the bearing was going, but tightened it up and now the clunk is better ( a temp. fix... part is on the way...) but i have been noticing a 2 stage clunk when i accelerate after the car warms up. if i depress the accelerator quickly and let up quickly it clunks on the depression and release, also when the tranny downshifts when there is no load on the drive line, like when i am coming to a stop going up hill. any clues?

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Body and Interior Specific Aid

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SVO/WVO
Questions and Answers

Chassis Model Number

W126

1984 300CD Sticking Throttle

I have a 1984 300cd and the gas pedal (accelerator) does not work any more. I thought that my car was sluggish because it needed a diesel purge (did that). Now the gas pedal does nothing. I tried to manually push the control linkage assembly and it seems to stick or get hung up. I think that I need a vacuum valve levers. Is there any thing else that would "loosen up" this problem? Thank you in advance for your help. Mathieu 1984 300cd turbo 314,000 miles

Chassis Model Number

W123

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Diesel Engine Specific Aid

240D charging problem

My Battery drains occassionaly in my 81 240D. I had my alternator tested and it tested OK. The car runs fine otherwise. The only other thing I have noticed is that the Break Pad light and the break warning light comes on and stays on at low RPM. These lights go away when I increase the RPM. Could there be short in the break warning system or is it still the bad alternator and the regulator that is causing the the break light on the dashboard to come on?

Chassis Model Number

W123

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Body and Interior Specific Aid

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