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, UK Qualified Car Technician
Category: Mercedes
Satisfied Customers: 4340
Experience:  Fully qualified / self employed garage technician in the UK
Type Your Mercedes Question Here...
Robert is online now

my van has been losing power going up hills and sometimes on

Customer Question

my van has been losing power going up hills and sometimes on the flat as well. tonight white smoke came out the exhaust. could be the turbo and is it safe to drive ?
Submitted: 3 years ago.
Category: Mercedes
Expert:  Robert replied 3 years ago.



Hopefully I can help..


Have you noticed any sort of unusual noises from the turbo unit since this has occurred?


What mileage does it have and what sort of service history does it have?

Customer: replied 3 years ago.

ive not heard any unusual noises. the van has been serviced every year at the sae garage. the mileage is 170000. there as been no problems thus far with vehicle

Expert:  Robert replied 3 years ago.

Hi..thanks for getting back..


Ok in regards to possible turbo failure then usually you would expect to hear this louder then it should be due to it wearing out internally vane shaft via the bearing inside or seals allowing engine oil to leak into the induction system or pass into/through the intercooler pipe work and thus you would get blue smoke loss of oil it maybe well worth inc that into the checks anyway..However as you say the smoke is white then this can usually be caused by a number of things if its has diesel smell to it for example caused by incomplete combustion - Engine/pump timing out - Fuel starvation to the pump causing the pumps timing not to operate correctly - injectors failure too much fuel check oil level isn't way to high a sure sign diesel is washing past the pistons into the sump cause by a injector fault - Low engine compression headgakset possible failure if coolant is low and smoke is of coolant type smell - Water in the fuel or main diesel filter which would be well worth checking up on first.. or possible misfuelling with petrol..the best course of action really would be to have your local garage check each as they go maybe try the filter first so long as they have the proper equipment for it as above they should be able to narrow done each as above.but as far as driving then I wouldn't risk it as long as it to a garage to fully check this over.I do hope this helps

Customer: replied 3 years ago.

im sorry but that has told me nothing. all youve done is guess at what it might be. which i new before i talked to you so ive wasted 21 pounds

Expert:  Robert replied 3 years ago.



Well im sorry you feel that way..but you did mention in your "already tried section" nothing had been done? im sure you'll understand I can't be expected to know what you have done and what you haven't done and what sort of expertise you have to check this yourself or tools - equipment etc - you also asked if it was safe to drive? - ive gave advice above as that's what you asked? - you asked if it was turbo? again I gave the usual symptoms as above which you could check in theory the advice isn't guess work..these as above are the usual symptoms related the problem you have and this is what you or the garage even would need to work through as above to reach a conclusion in regards to the fault you have....

Customer: replied 3 years ago.

ok im sorry, i just wanted a definate answer which i appreciate is not easy. ive already paid out for new injectors and a starter motor, it seems one thing after another

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!
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, 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


    Mechanical Engineer

    Satisfied Customers:

    BEng hons Mech engineering, in auto industry 22 years
< Last | Next >
  • Matt's Avatar


    Mechanical Engineer

    Satisfied Customers:

    BEng hons Mech engineering, in auto industry 22 years
  • Marty's Avatar


    ASE Certified Technician

    Satisfied Customers:

    Bosch Certified Master Technician with over 35 years experience in the automotive industry.
  • mike_a_mechanic's Avatar


    Mercedes Mechanic

    Satisfied Customers:

    17 years experience as a auto mechanic, foreign and domestic.5 years running my own repair business.
  • MB Paul's Avatar

    MB Paul

    Mercedes Technician

    Satisfied Customers:

    Mercedes Benz Qualified Diagnostic Technician
  • Greg's Avatar



    Satisfied Customers:

    Automotive diagnostic tech
  • Ross's Avatar


    Diagnostic and repair technician

    Satisfied Customers:

    Licensed diagnostic and repair technician