C218 CLS63, 2011 - 2019

Intermittent firing

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Old Sep 8, 2015 | 06:38 PM
  #1  
brainstormer1's Avatar
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From: Sacramento, CA
2012 CLS63 AMG PP
Intermittent firing

This morning, felt a slight uneven idle. Didn't think much about it and jumped on the freeway. Car starting sputtering and acting as though it was missing a cylinder. Oh yeah, the engine light came on and I started to panic.
I barely made it into the parking lot. As I came out of my appointment an hour later, I was prepared to call for a tow the local MBZ dealer.
I fired it up and she purred like a kitten.
No engine light, no hesitation, no sputtering....
WHAT THE HELL WAS THAT?
HAS ANYONE ELSE EXPERIENCED SUCH A NIGHTMARE.
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Old Sep 8, 2015 | 07:32 PM
  #2  
c55asleep?'s Avatar
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Joined: Sep 2007
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From: Miami
Bicycle
Originally Posted by brainstormer1
This morning, felt a slight uneven idle. Didn't think much about it and jumped on the freeway. Car starting sputtering and acting as though it was missing a cylinder. Oh yeah, the engine light came on and I started to panic.
I barely made it into the parking lot. As I came out of my appointment an hour later, I was prepared to call for a tow the local MBZ dealer.
I fired it up and she purred like a kitten.
No engine light, no hesitation, no sputtering....
WHAT THE HELL WAS THAT?
HAS ANYONE ELSE EXPERIENCED SUCH A NIGHTMARE.
You might still want to take it in. If the check engine light came on, it should store it in the memory.
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Old Sep 10, 2015 | 05:54 AM
  #3  
Zod's Avatar
Zod
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Joined: Jan 2007
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From: Kuwait
CLS55 2006, CLS 63S 2015
Originally Posted by brainstormer1
This morning, felt a slight uneven idle. Didn't think much about it and jumped on the freeway. Car starting sputtering and acting as though it was missing a cylinder. Oh yeah, the engine light came on and I started to panic.
I barely made it into the parking lot. As I came out of my appointment an hour later, I was prepared to call for a tow the local MBZ dealer.
I fired it up and she purred like a kitten.
No engine light, no hesitation, no sputtering....
WHAT THE HELL WAS THAT?
HAS ANYONE ELSE EXPERIENCED SUCH A NIGHTMARE.
Is the care tuned?

You might want to check spark plugs as been known to be a culperet
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Old Sep 11, 2015 | 07:07 PM
  #4  
brainstormer1's Avatar
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From: Sacramento, CA
2012 CLS63 AMG PP
Thanks,
I did take it in, they've had it for two days now......
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Old Sep 14, 2015 | 02:26 PM
  #5  
brainstormer1's Avatar
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From: Sacramento, CA
2012 CLS63 AMG PP
Resolution to intermittent firing

Originally Posted by brainstormer1
Thanks,
I did take it in, they've had it for two days now......
Found out today that I had a left and right O2 sensors that were bad, as well as a cross over switch for the turbos that was bad.

This is a 2012 with 26k miles. Why is it that these $100k+ cars just don't seem to hold up?

Two weeks ago I had tire pressure sensor problems. As well as the foot rest on the fire wall falling off.
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