W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

1975 240 D Electrical Power For Radio

I do not have any power to the electrical supply to the radio. Just bought the replacement fuse set from Kent and have cleaned all terminals and replaced every fuse. On the fuse box lid there is not an indicated fuse for the radio. So,,maybe I am not looking in the right place. Where is the fuse for the radio supply?

Thanks,
Tom Smith

Chassis Model Number

Forums

1984 300D Injectors Replaced, still rough

I just purchased some rebuilt injectors (the Monarchs on this site) and replaced them over the weekend. I did a valve adjustment while i was at it. Put everything back together and she started up after some cranking, but it didn't fix the very rough running of the engine. I'm happy to have the new injectors in there as I was due for them, but now I have to run down the problem. Think it could be the injector pump? Seems like a cylinder may not be getting fuel, or perhaps very little fuel. How can I check to see if the injector pump is working properly (or any other ideas)?

Chassis Model Number

Forums

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?

Chassis Model Number

Forums

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?

Chassis Model Number

Forums

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.

Chassis Model Number

Forums

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

Chassis Model Number

Forums

Pages