W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

Diesel fuel injector replacement issues

I am replacing the injectors in my '83 300SD. The rebuilt Bosh injectors came with new crush washers. I also have a new set of crush washers from mercedessource, which came with the fuel return line set. The issue is that the openings in the Bosh supplied crush washers are somewhat smaller and the crushable ridge is not as high as on mercedessource washers. Does this make any difference? Which washers should I use? I need an answer on this quick as I am doing this job right now.

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Diesel Engine Specific Aid

Grinding Brakes

Hello, I just did a complete brake job on my 1979 300SD. Replaced all the rotors, calipers, and brake pads, as well as the master cylinder. It all went fine, except now when I turn, there is a grinding noise that comes from the front wheels, it's like the brakes are grinding, but it only happens when I'm not driving straight. Any Suggestions? Thanks, Jeff

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Body and Interior Specific Aid

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Chassis Model Number

W116

'86 190e wiper switch stuck in on position, radio on, unless turned off manually

This morning I got in the my 190e and the radio was on, started OK, thought battery might be dead. Then turned on wipers, soon after smelled burning rubber, thought it might be coming from a construction site, only to find I could not turn off my wipers at the control stick-they are still on. It will not rotate, high beams work fine on and off, so do turn signals. So I have an electrical problem, I'll remove the cover to access the wiper, turn switch, no doubt, I'll see some major melt down there. Has anyone else had electrical problems with their 190e. I've just been driving this one for a week, I purchased it from a dealer with 97K. Where else should I be looking for problems that perhaps resulted in this issue I have this morning?

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Body and Interior Specific Aid

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Chassis Model Number

W201

76 300D thumping noise

I have 76 300D that makes a thumping noise that I was certain was the exhaust pipe hitting the chassis/frame. I know this noise and was very surprised to find the exhaust pipe was tight and not the source of the noise. It is related to engine shake at idle. The car starts/runs great but has always had a rough idle. It only makes the noise when the car is stopped in drive. The car will stop making the noise if I shift to neutral. I think there is more to it than the change in rpm caused by putting it in neutral.

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Diesel Engine Specific Aid

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Chassis Model Number

W115

450se hydraulic lifters

the left hand bank hydraulic lifters are not working. this happened while the engine was ticking over at 800rpm. the revs dropped off gradually until the engine syopped. all the lifters do not rise even though the oil pressure while cranking the engine is good. i am using the "left hand" term as stated in the manual,it is actually the right hand bank when view from the front of the vehicle. any ideas?

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Body and Interior Specific Aid

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Chassis Model Number

W116

Alternator with new regulator/brushes cuts out at 3500 RPM

My alternator stoped generating (but no charge light while running) so I replaced the regulator/brushes with the kit available here. Now, when I drive around with a volt meter attached to the battery, I see that the battery is being charged until the engine hits about 3700 RPM and doesn't resume charging until the RPM gets below 3400. The cut-in and cut-out RPM remain the same reguardless of what gear the car is in (even Park) or what accessories are on or off (although this does affect the battery voltage a little).

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Chassis Model Number

W124

Front end shakes and rattles

I have a 1983, 300SD. At speeds around 60 to 70 mph I get vibration that fells like it is coming from the right front wheel and I also feel it thruogh the gas pedal. Also when making a right banking turn, (as in going from one freeway to another freeway), the front end will shake violently. This also feels like it is at the right front wheel. Can you give me any help as to what to look at and what to look for?

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Body and Interior Specific Aid

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Chassis Model Number

W126

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