Questions and Answers

Multi accessory electrical short

i have a frustrating situation with my 89 300sel. my #15 fuse is blown, and it will immediately blow if replaced. My seat belt warning light constantly flashes, cabin light will not come on when doors are opened. they can be turned on manually, and my central locking system is inoperative. I realize that I most likely have a positve short to ground. Any ideas about a good place to start looking? Do these three symptoms point to anything specific? Any and all assistance would be appreciated. Thanks Dan Hammond

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Okay, so I bought a 1983 300D Turbodiesel. And now:

Hi all. New member as of today, and today I also picked up my 2nd Benz. I have some experience with my 1971 280S, but today, I bought my first diesel. The cars rather amazing overall, for a black on black leather car with original paint. One owner. 200K miles. A few little problems that I already see answers and/or parts for. Here's my concern. The car is amazingly slow from a stop to 10 or 20 MPH. Then it's decent, much like a gas car. I see an unusual "part", seemingly disconnected in the engine compartment. It's like a little frame with heavy coils inside of it. What is that part??? It seems to perform much better once it's warmed. I know NOTHING of it's history aside from a clean VIN check, one owner, 400 miles in the last 2 years and it was probably garaged.

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84 300TD Wagon won't start parked on a hill

My '84 300TD Wagon won't start if parked facing uphill - even the SMALLEST of inclines actually. Doesn't seem to have a probably parked facing downhill. Because bleeding the injectors gets it to start, I'm assuming it's air "in the system". Is there something I can do about this or is it just because the car is old? Thanks.

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87 300TDT IP shut off valve

My 87 300TDT has began to be hard to start after it has warmed up on a warm day here in FL. Has left my wife stranded 2 times. After it cools off overnight it starts right up and runs fine. I am thinking that it is the Injection pump shut off valve- The IP was replaced by Mercedes about 2 years back and they did not replace the shut off valve. Could some one describe what happens when this valve begins to be intermittent or fail? Many thanks, David

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Electric windows and major electrical shut down...

My 300D's blinkers and windows suddenly don't operate. There is an electrical shut down. The tachometer, gas gauge, blinkers, windows, emergency lights don't work. They all shut down at once while I was operating the vehicle. Other things like radio, wipers, clock, fan, a/c work fine. Any suggestions would be helpful. Has this happened to you?

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Transmission Won't Go Into Reverse

I have a 1981 240D automatic tranny and today I took the car out for a drive on the highway for ~30 min. then stopped at work for a few hours as I was about to go home I realized my car would no longer go into reverse. All the other gears work normally, fluid level is fine and I hear no grinding sound like its trying to go into reverse but can't. Does anyone know what might be going on??? I am going to climb under the car tonight and see if anything looks crazy out of place but I don't know really what I should look for. Any ideas would be greatly appreciated. Thanks. -Drew

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W123/617 torque values

I am looking for a listing of torque values for the W123/617 engine. I see references in various repair guides - esp. on page #83 of the Diesel Performance Tuning & Repair - to "recheck torque on each of the locking nuts..." - where can I find those Mercedes factory torque references (other than the Mercedes service manual)? Are those reprinted/listed anywhere else? Also, how truly critical is it that the value cover on the 617 engine actually be officially within factory torque specs? Any elementary guidance is greatly appreciated. thank you, Kieran-

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380SL idles high

1983 380SL IDles high, real high. Have tried several things from fuses to idle modules. But from reading the ignition swithch easy install kit, it seems the problem may be in the switch. When inspecting that area i discovered a wire spliced into the harness at the steering wheel. Placed a prob in line and it lights when starting the car. Also the heater blower motor is not functioning and the right side lights on high beam are out as well. I have no dash lights and the tach is not working.

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1979 300D Non-Turbo Mileage

My 300 non-turbo with 360K at best gets only 19 miles to the gallon of diesel. What is this car expected to get when running perfectly? I have owned this car for 2-1/2 years now, and the mileage has always stayed in the 17 to 19 mpg range. Other than that, the car has the usual issues that the older cars do, like worn vent pods inside the dash, old rubber seals on the rear window and doors. Is there anything that I can do short of disrupting the performance to increase my mileage? Thanks.

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