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: 4363
Experience:  Fully qualified / self employed garage technician in the UK
13210289
Type Your Mercedes Question Here...
Robert is online now

My Mercedes Benz W220 S320 CDi 2002 is too smoky when accelerate

Customer Question

My Mercedes Benz W220 S320 CDi 2002 is too smoky when accelerate sometimes and also after a stop at traffic light and go. It has been serviced last Friday 31/11/2014. What to do to get it the smoke stop?
Submitted: 2 years ago.
Category: Mercedes
Expert:  Robert replied 2 years ago.

Hi..

Hopefully i can help..

What sort of service was carried out? what things replaced?

What colour is the smoke that you see?

Was this an issue before the service?

Any performance issues or misfiring as such since this fault occurred or warning lights come on?

What mileage does it have?

Customer: replied 2 years ago.

What sort of service was carried out? what things replaced?

B service



What colour is the smoke that you see?

It depends, sometimes blue or black one



Was this an issue before the service?

Yes, one week before the service



Any performance issues or misfiring as such since this fault occurred or warning lights come on?

No misfiring and no warning



What mileage does it have?

113278 miles

Expert:  Robert replied 2 years ago.

Hi..thanks for your reply..

If there are no codes as such then it maybe well worth at least looking into the EGR system & removing the EGR valve to clean it out as this can give the type of problems you have - excessive smoking under load or taking off from a standstill - so if that hasnt been checked out as of yet then that might be one place to start..ensure the valve does work where ever take the vehcile to have this carried out..a simple clean maybe all its needing as these valve tend get coated in soot and thus the valve isnt able to open a shut and cause problems like you have above..

The next area of inspection would be the intake/intercooler pipe work to ensure there no tears or leaks in the/also check around the turbo,check for possible internal oil leaks on the turbo.wastegate is able to move freely - have you tried an diesel injector cleaner additive..if not then maybe try that in the tank of fuel and run it through and se if that helps..so as above certainly hve the EGR checked out first..I do hope this helps

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:

    481
    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:

    481
    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