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Engine warning lamp just came on...

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Old 07-02-2018, 06:54 PM
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2015 C300 Sport
Engine warning lamp just came on...
Only 39k miles. I'm gonna get it checked out ASAP. Does anyone have an inkling what it might be if I experience rough idling from a cold start? i.e. lots of vibration. It's not present with a warm start.
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Old 07-02-2018, 09:21 PM
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‘15 C300 4M Sport, ‘20 GLC300
Originally Posted by ItchyTasty
Only 39k miles. I'm gonna get it checked out ASAP. Does anyone have an inkling what it might be if I experience rough idling from a cold start? i.e. lots of vibration. It's not present with a warm start.
Hopefully it’s no big deal. You should look into an OBD2 reader. Plenty of cheap ones on Amazon. Quick question, did you have wrist pin issues?
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Old 07-02-2018, 09:38 PM
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Originally Posted by GreekUPS


Hopefully it’s no big deal. You should look into an OBD2 reader. Plenty of cheap ones on Amazon. Quick question, did you have wrist pin issues?
No wrist pin issues, mine didnt even need to be replaced.
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Old 07-03-2018, 12:53 PM
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2015 C 300 4MATIC
I took my car (40k miles) in yesterday for the same issue. The car has a slight vibration on cold start. My 2018 loaner is doing the same thing. So this may not be an issue.
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Old 07-03-2018, 12:55 PM
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Originally Posted by Up_Not_Down
I took my car (40k miles) in yesterday for the same issue. The car has a slight vibration on cold start. My 2018 loaner is doing the same thing. So this may not be an issue.
I hadn't noticed the vibration as much before though. And the check engine light doesnt come on for no reason.
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Old 07-03-2018, 01:31 PM
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2015 C 300 4MATIC
Originally Posted by ItchyTasty
I hadn't noticed the vibration as much before though. And the check engine light doesnt come on for no reason.
I didn't get a check engine light. Best to take it in.
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Old 07-05-2018, 11:04 AM
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Originally Posted by Up_Not_Down
I didn't get a check engine light. Best to take it in.
vent valve is getting replaced
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Old 07-25-2018, 01:20 PM
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W205 C300
Could you tell me how much it cost ? I got the same issue and without warranty. Thanks!
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