CEL rant
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MBWorld Fanatic!
Joined: Mar 2012
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From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
Yeah, I'm on H&R coilovers too.
You should see biglee73's photos. He has barely enough clearance with stock suspension to get in and out of his driveway.
You should see biglee73's photos. He has barely enough clearance with stock suspension to get in and out of his driveway.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2012
Posts: 4,026
Likes: 7
From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
P2198 - O2 sensor signal stuck rich. My SA says the adaptations probably need some tweaking due to the vacuum leak throwing them off. Back to the dealer on Monday.
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Thread Starter
MBWorld Fanatic!
Joined: Mar 2012
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From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
Perhaps, but there's always a diagnostic fee. And I needed a smoke test to pinpoint the leak. I'm not savvy enough nor do I have the equipment for a smoke test.
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From: PDX
1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
Thread Starter
MBWorld Fanatic!
Joined: Mar 2012
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From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
Okay...I'm leaving my car with MB all day tomorrow. They're going to check my O2 sensor again and examine my exhaust for any cracks/leaks (that's unlikely, but they're trying to rule out all possibilities). The SA knows about my modified exhaust and some of the other Service Managers go out on local drives with some of my friends (guys with Ferraris, R8s, Lambos, etc.), I think one of them even does some of the same Oakland racing as some other folks on the forum, but they're all cool with my vehicle. Not once have they given me any flack. They're also hooking me up with a loaner so fingers crossed. David, my normal SA, won't be in tomorrow, but Jordan (resident AMG master tech) has worked with me before. He's a super cool guy. I don't think I have to tell you guys how eager I'll be to put this behind me and finally get my follow-up dyno run.
Fingers crossed.
Fingers crossed.
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MBWorld Fanatic!
Joined: Mar 2012
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From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
Looks like the O2 sensor is fine. What's not fine is a crack in the driver's side LTH at the collector. Pics coming from the SA and I'm shooting the over to Rob@Vivid to take a look. This should be real fun.
Last edited by CoolBDPhenom03; Jun 13, 2013 at 05:29 PM.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2012
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From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
I received some blurry pics from the SA, but Rob could see it. Maybe I'm blind. I'll try to take better pics when I visit the exhaust shop after my car is back together.
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MBWorld Fanatic!
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From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
Latest update for those who are still subscribed:
I turns out the "leak" may actually just be a seal issue between the headers collector and the straight-pipe exhaust. It looks like my exhaust tips on the driver's side extend further out and one of the braces that holes the two tips together is bent, most likely due to some impact that may have pulled the collector off of the headers a bit, enough to break the friction seal.
An exhaust/muffler shop is looking at it right now and thinks it can just be adjusted. Fingers still crossed. Not sure how this would have happened because I couldn't see any obvious sign of impact, but with a lowered car, it could have occurred anywhere at anytime.
I turns out the "leak" may actually just be a seal issue between the headers collector and the straight-pipe exhaust. It looks like my exhaust tips on the driver's side extend further out and one of the braces that holes the two tips together is bent, most likely due to some impact that may have pulled the collector off of the headers a bit, enough to break the friction seal.
An exhaust/muffler shop is looking at it right now and thinks it can just be adjusted. Fingers still crossed. Not sure how this would have happened because I couldn't see any obvious sign of impact, but with a lowered car, it could have occurred anywhere at anytime.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2012
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From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
Update with pics...
Everything at the exhaust shop was tightened up and refitted properly, CEL cleared, and fog light fixed. I am mostly relieved it didn't end up being a crack in the headers collector and that I didn't have to drop the whole system. Fingers are still crossed for the next 50 miles or so to make sure it's really gone...then I can reschedule my dyno
Thanks, everyone, for putting up with my drama.
Everything at the exhaust shop was tightened up and refitted properly, CEL cleared, and fog light fixed. I am mostly relieved it didn't end up being a crack in the headers collector and that I didn't have to drop the whole system. Fingers are still crossed for the next 50 miles or so to make sure it's really gone...then I can reschedule my dyno
Thanks, everyone, for putting up with my drama.
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Hope this fix to your header connection does it for you and sure looks like it might. This was a long drawn out process to diagnose an exhaust leak. I think you kept your cool but I'll bet your happy it may be over. Rooting for you. 
