BENZ AID - COMMON QUESTIONS AND ANSWERS

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Chassis Model Number

W123

87 190D can't get into trunk

Greetings! I posted here recently about not being able to open the trunk or fuel door on my son's 1987 190D. The other day I borrowed a hand vacuum pump and drove over to his college to try to fix it. I found the actuator under the rear seat, disconnected the yellow tube that runs to the back and pulled a vacuum on it--still couldn't get into either. I'm sorry to say I had to take a hacksaw blade to the little stob that locks the fuel door. But I DON'T want to mess up his trunk latch, so do you have any suggestions on how I can get in?

Chassis Model Number

W201

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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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Chassis Model Number

W123

Rear De-frost on 300TD

Hello, Is there a main reason why the rear defrost wont work? I cheked the fuses and the wiring on the switch. Checks ok. Any thoughts or suggestions would help, these rear windows get really iced up quick! Thanks James

Chassis Model Number

W123

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Engine swap

Just got my 84 300SD running like a new car( thanks Kent) so on to the next project. A mint 76 300d that broke the timing chain after the previous owner replaced it. I have 2 options... a used unknown engine(already out of the car when I bought it) of the same year with 150,000mi? Or a 84 turbo running in the car(wrecked) with 220,000. My question is will the 84 turbo fit in the 115 chassis? Any ideas? Also any way to run the other engine on a stand so I don't transplant junk for more junk . Thanks Jon

Chassis Model Number

W115

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brakes/front

my 300td hassome brake problems i removed one calliper and all the rubber looking seals seem cracked and falling apart does this mean there shot? also how do i ckeck the rotor? any help would be great thanks.

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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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Chassis Model Number

R107

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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Chassis Model Number

W123

differential gear ratio changing speedometer function?

I am excited to install the taller gearset differential, purchased from mercedessource, in my 81 300D. I'm wondering if the new gear ratio will affect the speedometer function. I have an opportunity to acquire a good speedo from a turbo if its necessary. Thanks...

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Chassis Model Number

W123

Read more about differential gear ratio changing speedometer function?

'74 240D Belt Issues

I have a 1974 115 chassis 240D. I've been having issues with the alternator belt losing tension and squealing. My problem seems to be the the infernal way the tensioning works, mostly with the rack that the star headed bolt moves along. The rack seems to move up when I try to use the star bolt to tighten the belt, regardless of how tight the rack bolt itself is. I tried to skip the whole silly star bolt thing by simply levering the alternator with a judiciously placed prybar and then tightening the pivot bolt and star bolt. It seems to hold for one or two trips to the grocery store before the dreaded squeals start again. I'm using the conti brand belts and have replaced the star bolt and nut.

Chassis Model Number

W115

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