W110 W111 W112 Sedan, BENZ AID - COMMON QUESTIONS AND ANSWERS

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1979 300D convert to Turbo?

My 1979 300D is still painfully slow and runs a little rough even after the valve adjustment, purge, injector rebuild and fresh oil and fuel filters all the way around. Is it possible to retrofit an entire turbo assembly with the intake and exhaust manifold (like the used one for sale on this site) on this non-turbo 3.0 engine? Isn't it the same block and manifold? I'm sure someone has had this idea before but I can't find it on any blogs. Thanks

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Chassis Model Number

W123

85 300d Injector Nailing

Kent, I am having trouble with one of my five injectors nailing. Could you lend some advice? History: I sold my 82 and bought an 85 with less miles. I noticed that it was running a little rough and was smoking pretty bad. I figured that this would probably be cured easily so I brought it in and did some services on it including valve adjustment, diesel purge, cleaned the ALDA lines, and ran some 85 plus in the fuel. It continued to smoke (though not as bad) so I thought next that it was probably the injector tips so I bought the injector tips from you and followed your instructions on how to replace them and clean the injectors. I reinstalled them and no dice, still smoking and it was then that I noticed the nailing (I cannot remember if it was doing this before. It’s possible).

Chassis Model Number

W123

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wvo filtering

how does your on the go filtration system address suspended water.ive understood that wvo needs to be heated and allowed to settle for a while to allow suspended water to drop out.do you do a hot pan test on your oil to check for water?is water in wvo dangerous to your engine?

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SVO Fuel Conversion Specific Aid

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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Chassis Model Number

W123

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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Chassis Model Number

W123

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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Chassis Model Number

W126

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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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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