How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Robert Your Own Question

Robert
Robert, UK Qualified Car Technician
Category: Mercedes
Satisfied Customers: 4365
Experience:  Fully qualified / self employed garage technician in the UK
13210289
Type Your Mercedes Question Here...
Robert is online now

Hi, I bought an s class 320 l diesel recently. I have noticed

Customer Question

Hi,
I bought an s class 320 l diesel recently. I have noticed a coolant warning light appearing when I arrive home which is on a steep hill. The coolent warning light only appears when I am going up the hill.
Can you help?
Submitted: 3 years ago.
Category: Mercedes
Expert:  Robert replied 3 years ago.

Hi..

 

Hopefully i can help..

 

One of the first checks to make would be the actual coolant level in your coolant reservior tank and see if its a little low - make sure you check this when the engine is cold and top if required...The fact you say the light only comes on going up hill could mean as and when the nose of the car points up hill the coolant maybe/or will become higher at one end of the tank than the other until the car levels out of course and could be the level sensor maybe picking this up or be it at the end the level is lower and think the level has dropped suddenly - until as suggested above the car levels out and the level is even again in the tank ..so as above i would check the level first to top if required and then see how that goes..as long as the car inst actually over heating then it does sound like this is whats maybe happening..I do hope this helps

Customer: replied 3 years ago.

Hi,


I did check the level and the coolant level seems ok?


Any other advice?


kind regards,


Paddy


 

Expert:  Robert replied 3 years ago.

Hi..there.. thanks for getting back..

 

Ok..if the coolant level is fine and there are no other obvious issues as far as you can tell..then the next check really would be the level sensor itself could be playing up or bad connection maybe..but like I say above if the coolant light goes out when the cars on level ground or going down hill even then it could be as simple as what I mentioned before and may not be an issue in itself..so as above the next stage would be the check or have checked the level sensor..

What Customers are Saying:

 
 
 
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
< Previous | Next >
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
 
 
 

Meet The Experts:

 
 
 
  • Matt

    Matt

    Mechanical Engineer

    Satisfied Customers:

    482
    BEng hons Mech engineering, in auto industry 22 years
< Last | Next >
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    482
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    ASE Certified Technician

    Satisfied Customers:

    21371
    Bosch Certified Master Technician with over 35 years experience in the automotive industry.
  • http://ww2.justanswer.com/uploads/MI/mikeamechanic/2013-4-2_175558_photo.64x64.JPG mike_a_mechanic's Avatar

    mike_a_mechanic

    Mercedes Mechanic

    Satisfied Customers:

    116
    17 years experience as a auto mechanic, foreign and domestic.5 years running my own repair business.
  • http://ww2.justanswer.com/uploads/MB/MBpaul/2013-8-21_204936_paul.64x64.jpg MB Paul's Avatar

    MB Paul

    Mercedes Technician

    Satisfied Customers:

    212
    Mercedes Benz Qualified Diagnostic Technician
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    Technician

    Satisfied Customers:

    1080
    Automotive diagnostic tech
  • http://ww2.justanswer.com/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Diagnostic and repair technician

    Satisfied Customers:

    453
    Licensed diagnostic and repair technician