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  #1  
Old 12-05-2010, 08:16 PM
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Join Date: Jun 2009
Posts: 68
CLK Exhaust Smell

I am taking my '06 CLK 500 for service and also to address a couple of issues. It has the AMG exhaust. One of the issues is a burning smell inside the car. Doesn't happen all of the time. Usually the smell is after I have accelerated and come to a stop shortly thereafter. No oil consumption issues or check engine lights. I only run it on premium gas, too. Has anyone experienced anything similar?

Thanks,
Brian

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Brian
'94 E420 - 99K
'12 C300 4 Matic

Previously owned:
'06 CLK 500K Cabriolet
'85 300SD (Old Smokey)
2002 Boxster
2002 C320 (The five-pointed star Mercedes)
1993 300E 3.2 (Dealership's cash cow)
1979 300SD (Chrome beauty)
1983 300D (Old faithful)
1983 240D (Right lane cruiser)
1977 240D (Miracle of bondo)
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  #2  
Old 12-05-2010, 08:26 PM
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Join Date: Jun 2009
Posts: 68
CLK Exhaust Smell

I should also add that the smell inside the cabin is like heated ceramic.

Thanks,
Brian
__________________
Brian
'94 E420 - 99K
'12 C300 4 Matic

Previously owned:
'06 CLK 500K Cabriolet
'85 300SD (Old Smokey)
2002 Boxster
2002 C320 (The five-pointed star Mercedes)
1993 300E 3.2 (Dealership's cash cow)
1979 300SD (Chrome beauty)
1983 300D (Old faithful)
1983 240D (Right lane cruiser)
1977 240D (Miracle of bondo)
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  #3  
Old 12-06-2010, 08:24 AM
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Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Sounds normal to me.

Hard acceleration means a lot of fuel & the catalyst is working very hard to do it's job at that point.
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  #4  
Old 12-06-2010, 10:06 AM
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Join Date: Jun 2009
Posts: 68
RE: CLK Exhaust Smell

Thanks, M.B. Doc.

A couple follow-up questions. I read on another forum with someone who had a similar problem. They thought that maybe certain brands of gas had something to do with it or that a faulty oxygen sensor may prevent the catalytic converter from heating properly. Could any of these also be possible causes? Wouldn't a faulty oxygen sensor trigger a warning? Is there anything that I could add to my gasoline that is MB approved to help?

Best-
Brian
__________________
Brian
'94 E420 - 99K
'12 C300 4 Matic

Previously owned:
'06 CLK 500K Cabriolet
'85 300SD (Old Smokey)
2002 Boxster
2002 C320 (The five-pointed star Mercedes)
1993 300E 3.2 (Dealership's cash cow)
1979 300SD (Chrome beauty)
1983 300D (Old faithful)
1983 240D (Right lane cruiser)
1977 240D (Miracle of bondo)
Reply With Quote
  #5  
Old 12-06-2010, 10:29 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The brand of fuel can make a slight difference, due to the additive package used by that brand.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
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