Question about 1991 Mercedes-Benz 300 Diesel

1 Answer

I have a 1991 mercedes 300 2.5 turbo diesel. car runs great but coolant light on dashboard comes on and off? Any suggestions

Posted by on


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 whose answer got voted for 500 times.

  • Mercedes-Benz Master
  • 1,619 Answers

Replace coolant sensor and make sure all air bubbles are out of the system.

Posted on May 05, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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

Radio not coming in 1983 Mercedes 300 Diesel. Please advise

check for fuse,but more than likely you will need another radio

Sep 23, 2013 | 1991 Mercedes-Benz 300 Diesel

1 Answer

Esp light comes on and the turbo does not work on mercedes E 300 turbo diesel w 210

i think you may have a problem with one of the sensors on the turbo not sure what one or where it is on this model engine ,i would be inclined to look for any sensors then test them with a automotive multimeter although a normal one would check resistances and voltages just as well ,also check for any vacumn pipes that may be perished on or aound the inlet manifold area

Nov 15, 2011 | 1998 Mercedes-Benz E-Class

1 Answer

I have a 91 300 sl, I think the seal to the transfer case is blown it wont hold coolant, is this a possibility?

Where is this "transfer case"? Why I ask, os transfer cases are usually in 4 wheel drive vehicles and don't have coolant going through them. I'm suspecting your referring to coolant overflow tank, plastic container... please identify location and a description so we can help you.

Mar 09, 2011 | 1991 Mercedes-Benz 300 Diesel

1 Answer

Changed the battery and the radio needs a code. 1991 mercedes 300D 2.5 turbo

Upon submission of your car registration and driver's licence to any Mercedes Benz dealership, a servicemanager will gladly lookup the respective radio code for the model car.Thereafter,save the code in a safe place and for easy access you can save the code on your cell phone

Jun 01, 2010 | 1991 Mercedes-Benz 300 Diesel

1 Answer

1990 mercedes 300d 2.5 turbo diesel Car will not back up when in reverse all th eforward gears work ok?

you have problems in the reverse clutch assembly.reverse clutch piston and seal leaking.worn retaining rings.worn internal gears or sun put carrier.and reaction carrier.

Jun 30, 2009 | 1991 Mercedes-Benz 300 Diesel

1 Answer

Car will not start after changing fuel filters

hi,you my remove again the filter,fill clean diesel before you install,make sure all the gasket are tight,ty

Dec 13, 2008 | 1991 Mercedes-Benz 300 Diesel

1 Answer

Never owned a diesel

yes very much so in the winter.. diesel fuel can gel if it gets cold enough ...that why you see semi trucks sitting on the sholder of the road on really cold days when there fuel gels,,,,,,if you live near a truck stop or or where trucks fuel look for HOWES fuel treatment it works great...if your car has a block heater on it keep it plugged in on cold days car will stat easier ... hope this helps...

Dec 11, 2008 | 1991 Mercedes-Benz 300 Diesel

1 Answer

Need engine vacuum diagram 300D L5-2.5L Turbo Diesel

I think you can get this diagram on All data, about 12 bucks or so a year
Good Luck

Sep 25, 2008 | 1991 Mercedes-Benz 300 Diesel

1 Answer

1991 300d 6cly turbo no instrument lights

I would first check the fuses in the engine compartment and repair / update if necessary. Also, this model is notorious for have solder connectons being burned open behind the instrument pnl. Carefully remove the instrument paneland verify connections and/or repair them.

Jul 06, 2008 | 1991 Mercedes-Benz 300 Diesel

Not finding what you are looking for?
1991 Mercedes-Benz 300 Diesel Logo

165 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

80339 Answers

Joseph Prosser

Level 3 Expert

772 Answers

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

Answer questions

Manuals & User Guides