C300 Check Engine Light
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C300 4matic
C300 Check Engine Light
2016 C3oo 4matic, less than 300 miles. Check engine light came on. After research, might be gas cap (had filled up for the first time the day prior). I have now messed with the cap and think it is back on flush (although, I thought I had done that after filling up). How long until the system resets itself, usually? Just hoping it is resolved, and will not need to attend my scheduled service appointment.
Also, do they normally run with an engine temperature that registers at >80 on the engine temp gauge?
Also, do they normally run with an engine temperature that registers at >80 on the engine temp gauge?
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Joined: Jan 2016
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2016 volkswagen beetle
2016 C3oo 4matic, less than 300 miles. Check engine light came on. After research, might be gas cap (had filled up for the first time the day prior). I have now messed with the cap and think it is back on flush (although, I thought I had done that after filling up). How long until the system resets itself, usually? Just hoping it is resolved, and will not need to attend my scheduled service appointment.
Also, do they normally run with an engine temperature that registers at >80 on the engine temp gauge?
Also, do they normally run with an engine temperature that registers at >80 on the engine temp gauge?
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Joined: May 2014
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From: Northeast USA
AMG CLE 53
It's normal for the temp gauge to read just above 80. I have a C400 that always reads one or two marks over 80. Every C300 loaner I've driven was exactly the same.
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2016 volkswagen beetle
What about any performance issues? Do you notice any odd sounds, rumbles, smells, misfires, bad fuel economy, ect.....? I'd definitely invest in a scan tool because they pay for themselves. They're really helpful if you plan on keeping the car past warranty (cars of this caliber are pricey to diagnose). You plug it in under the dash and if there's any fault codes, it'll give you a fault code then you can look up the code on the web and you'll know what's wrong before you show up to the mechanic. It's hard to imagine there would already be an issue with sensors or practically anything else. That's why I asked if you were using the right gasoline. I'd guess your car just needs a software update.
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C300 4matic
What about any performance issues? Do you notice any odd sounds, rumbles, smells, misfires, bad fuel economy, ect.....? I'd definitely invest in a scan tool because they pay for themselves. They're really helpful if you plan on keeping the car past warranty (cars of this caliber are pricey to diagnose). You plug it in under the dash and if there's any fault codes, it'll give you a fault code then you can look up the code on the web and you'll know what's wrong before you show up to the mechanic. It's hard to imagine there would already be an issue with sensors or practically anything else. That's why I asked if you were using the right gasoline. I'd guess your car just needs a software update.
For reference, I am not driving this car like a maniac. These lights and warnings are disconcerting, and dealer cant get me in until Tuesday.
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Thread Starter
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C300 4matic
Will update when the dealer has looked at the car.
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C300 4matic
Turns out it was a software issue with the check engine light, a fault that has affected other c300s at the dealer. They reset it and said the update would be ready in a month or so, at which point I would need to go back in and have it updated.
The brake light was caused by a factory defective sensor. In all the fix took less than an hour.
The brake light was caused by a factory defective sensor. In all the fix took less than an hour.
Member
Joined: Jan 2016
Posts: 238
Likes: 24
2016 volkswagen beetle
Turns out it was a software issue with the check engine light, a fault that has affected other c300s at the dealer. They reset it and said the update would be ready in a month or so, at which point I would need to go back in and have it updated.
The brake light was caused by a factory defective sensor. In all the fix took less than an hour.
The brake light was caused by a factory defective sensor. In all the fix took less than an hour.
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