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C300 exhaust info?

Old Oct 19, 2015 | 11:52 AM
  #1  
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From: Cambridge, MA
2015 C300 Sport 4MATIC
C300 exhaust info?

C300 doesn't have an exhaust flap right? I ask this because I only get soot build-up on my right exhaust tip.


This is a characteristic of BMW's when the left tip is far more dirty because the right side of the exhaust only opens up at higher RPM's.


Does any one have info on this exhaust system?


Thanks
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Old Oct 21, 2015 | 10:31 AM
  #2  
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2015 C300 Sport 4MATIC
bump
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Old Oct 22, 2015 | 12:43 PM
  #3  
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2015 C300 4matic
Bump and if there is any info on Cold Air Intakes as well..
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Old Nov 17, 2015 | 10:00 PM
  #4  
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From: Cambridge, MA
2015 C300 Sport 4MATIC
i figured out why by looking under my car, stealing this pic from @angeloxnet because it shows what is happening perfectly. where the single pipe splits into two, it is heavily angled towards the right exhaust outlet, which is why a lot more exhaust gas comes out of the right exhaust tip than the left. Was really evident in the could today when there was a lot more smoke coming out of the right side, looks really uneven and makes only the right tip sooty


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Old Aug 9, 2017 | 05:54 PM
  #5  
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From: San Jose
2016 C450 AMG, 2009 C300, 2001 C320 2001 CLK430, 95 E500
It gets worse!

After the left front total pressure loss, fortunately I only had 150 yards to get home. I didn't drive the car. I did a quick feel and look on the RIGHT front and didn't notice the complete wear that the left front total catastrophic loss hard - but wait.

So, I got all four tires replaced and they said "you know your RIGHT front was also bad" I had a look now that it was off the car and sure enough it had even WORSE problems (note the total radial/metal exposure and inner wall exposure. It's not fully around, only about 15% of the inner tire wall - which is why I hadn't noticed anything. But clearly, it was failed. a quick measurement of the inner tread shows they are at 4/32, so we're below 5/32 but they were about at 5-6/32 when NEW.

Anyway, I know we all had these pirelli run flats on the original 2016 C450 in the usa so I would strongly encourage anyone who still is running these tires at 10K+ to CHECK THEM NOW.

In my opinion this really shouldn't happen like this.

As well, I had JUST had the car in for the 10K service (it was at 11K but still) and then I have driven the car 280 miles since then. The service checkup said NOTHING about tire wear, or this issue which I really can't imagine wasn't evident at the time of the service done.
Attached Thumbnails C300 exhaust info?-img_5004.jpg   C300 exhaust info?-img_5005.jpg   C300 exhaust info?-img_5006.jpg  
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Old Aug 10, 2017 | 01:41 PM
  #6  
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So yeah bad. Struggling to know how this relates to an exhaust thread tho?
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Old Aug 11, 2017 | 07:05 AM
  #7  
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Originally Posted by ManiacGT
So yeah bad. Struggling to know how this relates to an exhaust thread tho?
There's this polar bear...
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