W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

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Chassis Model Number

W126

'76 300D will not reverse

Automatic transmission. When I drop it into reverse the engine just revs as if it were in neutral. Park and drive are just fine, drove it 50 miles to home after the security guard pushed me out of the parking space. I've got two different mechanics saying I need a new transmission, but a guest staying at my inn says it might just need a reverse pin adjustment. Can anyone explain what this is to me? Or has anyone else out there had this problem? Thanks! Nicole

Chassis Model Number

W115

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123 126 diesel vacuum leak diagnosis

My 1985 300TD has a vacuum leak. The engine won't shut down without using the manual stop and the door locks don't work. The brakes and transmission are working fine. Does the fact that the brakes and transmission are working while the shutdown and doors are not, help in locating the leak? Or, do I follow all the usual steps (as described in Kent's vacuum source leak detection manual)? [by the way, is it possible to search the forums?]

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SVO/WVO

Chassis Model Number

W123

Transmission vacuum shifting valve keeps dying

I've got a 81 300D. The transmission vacuum shifting valve went bad & it started shifting hard & going back & forth between gears. I replaced it with a good valve off my 'spare parts' car. The transmission started shifting like perfect again. However, after maybe a month the car is shifting hard again. I suspect something on the car is killing this valve.

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Biography

Chassis Model Number

W123

84 300SD slightly rough idle with minor smoke from exhaust

Hey there. Quickly I have an 84 300SD. It is in VERY good condition, everything works (kinda scarry) AC,cruise,acutmatic climate control, I mean it is in really excelelnt shape all the way around. 139k miles and I bought it a few months back. I have done your diesel purge, paid a very reputable shop to do a vavle adjustment and they replaced a vacuum pot that was causing a little shifting gremlin. Anyway all is fine except that a new glitch has occured. I started the car the other day and the idle was a bit rough. Nothing earth ratteling but I also noticed that there is a little smoke coming form the exhaust and ther used to be quite literally none that you could see.

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Chassis Model Number

W126

rear subframe mounts 300 TE

1991 300TE 124 body Question,Found black ,very thin liquid or thin oil under driverside rear wheel,It's not brake fluid or hydra. oil from suspension, seems to be comming from the subframe mount. Question is do these contain oil inside the rubber? Any help with this greatly app.. The wife's baby don't cha know.

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Chassis Model Number

W124

Read more about rear subframe mounts 300 TE

Subframe mounts 1988-560SL

Just received the subframe mount replacement kit. As I am doing a pre-job review of the instructions and looking under the car with front wheels removed - I am concerned with the transmission cooling lines attached to the radiator. Should I detach these lines prior to lowering the subframe??? Looks like they may get hung up if I don't. Has anyone experienced this when doing this job? (The transmission lines are not mentioned in the instruction book) I am looking forward to doing this job myself and hope to get all my ducks in a row prior turning the wrenches.

Chassis Model Number

R107

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78 300D lost power on highway and stalled, now wont start

I was recently driving down the highway when my 300D seemed to be starving for fuel. It had the usual symptoms, sudden loss of power, no engine response when I hit the gas. So I coasted over to the side of the road and as soon as I stopped, the engine shut off. Now my car won't start. I replaced both fuel filters a week before and have since replaced the glow plugs and still to no avail. I have checked the voltage at each plug and all 5 have power, the engine is getting fuel (although I don't know if it's getting enough) but it just cranks and won't fire.

Chassis Model Number

W123

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1985 300TD hood hinge replacement

my hood hinges on 85 300 td wagon got all bent...on one side the hole in the engine compartment that the hinge connects to rusted out...can i just change one side...trying to do this and having a hard time replacing the 13 mm bolt that goes through the hinge into the body of the car can't get a socket wrench in there and can't get enough pressure putting the bolt into the hole to get the threads started...am i making any sense? any recommendations??? thanks for reading...

Chassis Model Number

W123

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85 300TD vacuum pressure reading?

i have a 1985 300td wagon...testing the vaccum pressure...it is at 17...is it worth a vacuum pump rehaul to bring it up to the standard 20-23?...thanks...

Chassis Model Number

W123

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