W126, BENZ AID - COMMON QUESTIONS AND ANSWERS

81 240D new voltage regulator squealing

Since my 240D's alternator clearly wasn't charging anymore, I figured I first better replace the voltage regulator. The old regulator was clearly shot, and I got the new one in. Now the alternator is charging fine, but it is also making an intermittent loud squealing noise - especially when accelerating. Any chance this noise will go away or diminish as the new brushes "break in", or is it time for a new alternator?

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1984 300D lousy mileage after valve adjustment

I recently changed the glow plugs and reamed out the carbon on my 1984 300D with 129,000 miles on it. At this time, I also did a valve adjustment as I was told all of this would help with hard starting in the winter. Well, it has helped and the car has more power also. The valves were very tight and I had never adjusted them over my 15 years of ownership. Anyway, now my fuel mileage seems to have gone way down. I used to get around 22-24 with daily driving and around 28-30 on the highway. On a recent trip, I was getting 20 MPG on the highway. Any ideas as to why?

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1984 300D Knocking sound from right rear wheel area

At the end of a from a trip of about 4 hours, I noticed a very harsh knocking sound coming from the right rear wheel area of my 1984 300D every time I took off from a stop. It sounded like the axle or wheel would fall off. It stopped after I arrived and parked it over night. At the end of the return trip, it started again and continued every time I took off from a stop. The next evening, I got under the car and checked axles, U-joints, drive shaft carrier bearing, wheel bearings, differential oil level and could find nothing definitive.

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83 300SD Starter change

Looks like I am in need of a starter change....woke up this morning and my 83 300SD will click but not turn over. It is usually sluggish on cold mornings, but early this AM I turned the key to nothing. I have a starter coming in and wanted to know if there are any special techniques or tools required to change this part? Looks like I am going at it from the underside, any help before I get dirty would be appreciated.

Brad

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1985 300D trans kickdown switch not engaging ??

Flooring the accelerator pedal does not engage the kickdown switch on the automatic transmission. The pedal reaches its stop before the rod under the pedal can depress the switch. I tested the switch and it is good. Can I adjust the control pressure rod to allow more accelerator movement without damaging the transmission or throwing it out of adjustment? Is this adjustment easy to do?

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