Question about 1991 Mercedes-Benz 300 Diesel

1 Answer

1991 mercedes 300 sel. i just flushed out the coolant and added new coolant. heater now doesnt work.

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

Aux heater valve by the battery area my have crapped out on you.

Posted on May 19, 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

I flushed out the coolant in my 91 Toyota Mr2 and Added new coolant and its not going threw and car and over hearing how do fix?

Did you do a coolant flush because it was overheating?
Sounds to me like you have a bad thermostat.

May 03, 2015 | 1991 Toyota MR2

1 Answer

Where are the relays located at in 1991 Mercedes Benz 300 SEL ?

they are on seveal different places. Some are in the fuse box located under the hood in front of the driver. Others are inside the car behind the dash. What relay in particular are you trying to find?

Sep 23, 2014 | Mercedes-Benz 300-Class Cars & Trucks

1 Answer

I drive a 1991 mercedes 560 sel and i want to change the stereo in it. The only problem is the wires that i need to connect to the new deck are not colour coded the same way the instructions are for the...

see if the store that sold you the radio has a wire adaptor kit. they are available for most american/japanese cars so i would think a mercedes one should be available.makes easy work out of the job

Apr 21, 2010 | 1991 Mercedes-Benz 560

1 Answer

Where is the pollen filter locatedon a 300 te 4matic the heater only blows cold air there are no visable leaks

1989?' it doesnt have a pollen filter that i know off ,cold air ?' remove the feed hoses and flush the heater rad reversing the direction a few times ,dont forget to put antifreeze back in ,100% is best

Jan 12, 2010 | 1989 Mercedes-Benz 300-Class

1 Answer

1991 Mercedes Blinker and hazzard lights light up but don't blink

Needs a New Flasher. This is located in the center console somewhat near the ashtray.

Jan 04, 2010 | 1991 Mercedes-Benz 420

1 Answer

1980 mercedes 300cd. The heater blows cold. It has a brand new servo unit. The recirculation pump is works when hot wired. All new hoses and clamps.The vacuum heater valve is operational. I am ready to...

Check you have coolant flow to the heater core - feel the inlet and outlet coolant hose as near as possible to the heater core- they should be both be hot and approx equal in temperature.
If the outlet hose is noticably colder you may have a blocked heater core ( a reverse flush with water from garden hose may fix it).
Check the cooling system has been properly filled, with the heater coolant valve open, bleeding off any airlocks as required.
Check any cold/hot air re-direction vane within the cab heater air ducting is operating properly (not seized or stuck).

Oct 27, 2009 | Mercedes-Benz 300-Class Cars & Trucks

1 Answer

Removing int door skin 1990 300 sel. the rear window guide/retainer has broken

start from bottom and pull. remove any screws that might be holding the panel on the door first they may be covered by little plastic caps. then work your way up around the edges. be sure to disconnect any swtches befor u pull the cover all the way off. then push the hole panel up.

Aug 15, 2009 | 1991 Mercedes-Benz 300 Diesel

1 Answer

Broken heater

I know this is an old post. Has the problem been corrected? If so I am sorry no one took the time to assist you here. If you are still having this problem I would like to help. Let me know.

Oct 31, 2008 | 1991 Mercedes-Benz E-Class

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

Related Topics:

144 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

79847 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