W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

1982 300td - Do rear headrests exist?

I *think* I have seen some 300td wagons with rear seat headrests. My 1982 version does not have such things, but I am interested in them given that I often carry passengers in the rear seat. (By rear seat, I am referring to the actual rear seat, not the 3rd row flip-up seat.) Any info about obtaining / installing would be greatly appreciated. Thanks, Dale

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81 300D Big valve stem mistake

Kent, OK, I know I could have completely avoided this problem if I had only been using your instructions. But (& it always starts that way) I had replaced 2 sets of valve stem seals in the past 6 months using your instructions & I thought I knew the steps. Yup, the one biggest warning you give was what I did: removed the nuts on a stem & it dropped down. The cam is in the 1 o'clock position & the stem is about 3/4" from the surface.

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300SD Cruise pulses to beat of blinkers

1984 330SD I have noticed that when I run with cruise on it behaves perfectly. However, if I signal a lane change with the cruise on the cruise control "pulses" the enginge speed exactly to the rythm of the turn signal. I can only assume electric but I am not sure as I am still learning MB behavior. It is kinda' funny actaully but is annoying (it is not voilent but it is like someone lifting the pedal and re-applying it) Thoughts? Doug in TX

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300SD - Ok Just what brakes do I have?

I have an 84 300SD (126) and have a question. My shop that is helping me with my car said that my brakes work great (and they do) but the pads are worn. I have read here and in other helpful forums that it can be hard to tell whick brakes your car has (ATE,Bendix etc). Is there a way I can tell what brakes I have so I can order the right replacement pads. I am all fired up now and want to do that on my own also. Thanks in advance guys, Doug in Dallas P.S. I got the new primer pump and it was a super easy install. It works really great and does not leak. Thanks again for that.

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'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

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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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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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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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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.

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