Question about 1993 Mercedes-Benz Mercedes Benz 300 Class

1 Answer

1993 Mercedes 300D loses power up hills.

My 300D has very slow Accerleration. Frequently loses power up slight grades. Is it a turbo problem, transmission problem, or something else?

Posted by on

  • 1 more comment 
  • Anonymous Apr 28, 2009

    '82 300TD. One day lost power going up a hill. any new developments with jet_reid?

  • Anonymous Mar 25, 2014

    Loses power on hills

  • Anonymous Mar 25, 2014

    loses power on hills



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 2,920 Answers

It could be a turbo problem but i dont think its the transmission or it wouldnt be almost has to be the turbo.

Posted on Jan 13, 2009


1 Suggested Answer

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Hi my 02 avensis verso totally loses power when hot going up a hill or incline..really embarrising...cleaned ecg valve any other ideas

The air filter can sometimes be a good place to start, as a slightly blocked/dirty/damaged one can give the car near normal operation on flat roads but when going uphill make it slow right down.

would suggest you try that first. If that doesn't work it could be a faulty/blocked fuel filter or dodgy turbo or slipping clutch or air/fuel mix issue (faulty sensor).

Jun 30, 2014 | Cars & Trucks

1 Answer

1983 mercedes 300d turbo diesel automatic electrical problem

There is a junction block about 6 inches in front of the battery on the fender, there should be battery voltage on the big wires. The small wire is the starter solenoid. Front the junction block, the power goes to the light switch then to the ignition switch.

Good Luck


Jun 25, 2010 | 1983 Mercedes-Benz 300-Class

2 Answers

Losing power in accelation

Fuel filter is probably clogging up (it's common), which restricts fuel flow and makes it hard to make the needed power for acceleration or other high-load situations like climbing hills. Change it and you'll probably be fine.

Jun 23, 2010 | 2005 Honda Civic

1 Answer

1985 300d none turbo idling problems

is this the model with the vacumn operated govenor for the idle ??

Nov 26, 2009 | 1985 Mercedes-Benz 300

1 Answer

No power, idling rough

Replace the catalytic converter and EGR valve

Jun 03, 2009 | 1991 Subaru Legacy

2 Answers

As I go up hill at 70mph I lose power down to 55mph - the turbo is not kicking in. Is this a problem with my fuel filter? or air in the fuel piles or what? Any help much appreciated, thanks, ps even at...

It depends on the hill, too. Although the engine is rated at 125hp and 170 lb-ft of torque, the car weighs over 3,000 pounds. at low speeds you may have a lot of lag because of the turbo design. When this car was made, it was designed without an intercooler, so to keep the compressed air from the turbo as cool as possible, a larger, slower-spinning turbo was used. The slower turbo heats the air less as it passes through, but requires more engine RPM to produce useful boost, and also lags quite a bit along the way. I also have an 84 300D, and although the car runs almost perfectly, the turbo does not wake up until 2200rpm. You can pep up the turbo in a few ways. Make sure you change both fuel filters (both on the left side of the car, one down low that looks like it came from a lawn mower, and one mounted near the front, which looks like a big spin-on oil filter). Changing the air filter makes a big difference also. You may want to try an additive called Diesel Lube, which comes in a white jug with a red top (available at auto parts stores and most Walmarts). As for more mechanical things, adjust the valves, or get them adjusted. Also check out the ALDA, which is the device on the injection pump which adds fuel when the turbo kicks in. This is a hex-key type screw with a lock nut on it. Hold the hex key still, loosen the lock nut (but don't take it off!), turn the hex key 1/2 turn counterclockwise, and while you're still holding the hex key and keeping it from rotating, tighten down the lock nut. Take the car for a spin and see if that makes a difference. if it does, do that again. You'll find that it adds some power as you go, but it will increase your fuel consumption to a point, and when you pass that, all it does is make the exhaust sooty and waste fuel, so you'll have to turn the key back in the clockwise direction. Find a position you like that gives good power but doesn't soot up the back of the car, and you'll be in good shape. If you do all of these things, the car will be quieter, quicker, and probably won't lose as much speed on that hill of yours. To comment on the other answer, you'll know if the turbo is bad, because you probably won't hear it spin up when you accelerate, or if you do, the whistling sound will be rough, and the lag will be abominable. Good luck, and enjoy.

Apr 24, 2009 | 1984 Mercedes-Benz Mercedes Benz 300 Class

1 Answer

Car looses power up a hill

How slight was the hill and how much weight did you have in your car? When you got power back was it because you were no longer on the hill or were you going downhill?
You may just need to drop down a gear to get the power back, if you have a heavy car even slight hills can cause it to lose power especially if your in top gear. You have a "sports transmission" option (I'm pretty sure it's on all the DSG transmissions) you just need to move it across to the +/- bit and move the stick to the - to go down a gear. Otherwise you'd have to wait until your auto decides it's lost enough revs to go down a gear. Which is why I hate autos.
Otherwise it could be bad fuel or something wrong with the turbo.

Apr 07, 2009 | 2006 Volkswagen GTI

1 Answer

Loss of power going up grade

sounds like a very common problem on turbo vag vehicles,the variable vains are sticking in the turbo,your fault code would have said....turbo boost pressure not reached.....common with v v t turbos,run a good quality fuel cleaner through it ,if that doesnt work then a new turbo is the only cure

Dec 29, 2008 | 2004 Audi A4

1 Answer

Where is the waste gate on a mercedes benz 300D?

The waste gate is on the turbo....the can with a hose on it. The "regulator" on a 300d is in the diesel pump

Dec 17, 2008 | 1987 Mercedes-Benz 300-Class

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

814 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers


Level 3 Expert

85108 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides