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While driving, this on dash appeared. Engine is now running rough.
i just filled up my gas tank.
Not sure what it is or what I should do before going over the bridge?
While driving, this on dash appeared. Engine is now running rough.
i just filled up my gas tank.
Not sure what it is or what I should do before going over the bridge?
That's the Check Engine Light. Is it flashing or solid? It likely misfired due to bad gas or something else. You'll have to read out the error codes to see why it's on. If it's flashing, stop the engine. If it's solid then you can keep driving. Flashing is generally a misfire and it goes solid afterwards if the misfire clears. Engine running rough is also an indication of misfiring.
I had a misfire in my FL last year and even though it cleared it was running a bit rough for a while. I was like a 100 miles away from home, but it started to run fine after a while. Dealership updated the ECU and so far have not had any misfires again. I see yours is a 2019 as well, so you could have the same issue and your ECU needs the same update.
Last edited by superswiss; 04-25-2024 at 08:06 PM.
That's the Check Engine Light. Is it flashing or solid? It likely misfired due to bad gas or something else. You'll have to read out the error codes to see why it's on. If it's flashing, stop the engine. If it's solid then you can keep driving. Flashing is generally a misfire and it goes solid afterwards if the misfire clears. Engine running rough is also an indication of misfiring.
I had a misfire in my FL last year and even though it cleared it was running a bit rough for a while. I was like a 100 miles away from home, but it started to run fine after a while. Dealership updated the ECU and so far have not had any misfires again. I see yours is a 2019 as well, so you could have the same issue and your ECU needs the same update.
It was solid. I shut the car off for a few mintures. When I restarted the warning was gone and had not reappeared. My car seems to be driving normal now.
. Maybe from downshifting?
Thanks for quick reply
It was solid. I shut the car off for a few mintures. When I restarted the warning was gone and had not reappeared. My car seems to be driving normal now.
. Maybe from downshifting?
Thanks for quick reply
Get it checked out. If it was a misfire, the code will be stored. The light will go out after a while when the condition has cleared, but the codes remain so a technician can see what happened. It's always a good idea to carry an OBD-II dongle and have a phone app such as Carista on your phone, so you can plug it in and read out the codes on the go. Since it coincided with filling your tank, chances are that it was fuel related. You wanna fill at stations that see lots of traffic from luxury cars, otherwise the Premium fuel can be stale.
Last edited by superswiss; 04-25-2024 at 08:22 PM.
Get it checked out. If it was a misfire, the code will be stored. The light will go out after a while when the condition has cleared, but the codes remain so a technician can see what happened. It's always a good idea to carry an OBD-II dongle and have a phone app such as Carista on your phone, so you can plug it in and read out the codes on the go. Since it coincided with filling your tank, chances are that it was fuel related. You wanna fill at stations that see lots of traffic from luxury cars, otherwise the Premium fuel can be stale.
Yes. Will do. Will call tomorrow. Just had the 5 year service done few weeks ago with spark plugs and Service A. The dealership I used is under renovation and the Service dept. Is a mess.
Yes. Will do. Will call tomorrow. Just had the 5 year service done few weeks ago with spark plugs and Service A. The dealership I used is under renovation and the Service dept. Is a mess.
Oh that could be another reason. The spark plug gaps have to be correct, or they messed up one of the ignition coils while changing the plugs. I had my 5 year service in January and so far no issues with the new spark plugs.
Last edited by superswiss; 04-25-2024 at 08:36 PM.
Oh that could be another reason. The spark plug gaps have to be correct, or they messed up one of the ignition coils while changing the plugs. I had my 5 year service in January and so far no issues with the new spark plugs.
Update: The previous solid Engine warning lamp has not come back on while driving and car feels normal. I filled up at a busy Mobile station but used one of the end pumps. About 4 miles later the Engine warning light appeared and the engine was running rough. I immedistely stopped, turn off the ignition and when I re- started my car the Engine warning did not come back on and made it to my destination.
So as noted by the Owners Manual photo below I will bring it in to MB tomorrow.
If it was caused by filling up the car with bad fuel so what can be done now since I have a full tank? The gas cap was secured.
While driving, this on dash appeared. Engine is now running rough.
i just filled up my gas tank.
Not sure what it is or what I should do before going over the bridge?
What do you mean going over the bridge?
It's either bad gas, a loose gas cap or coincidently one of your coil packs have decided to say goodnight
It's either bad gas, a loose gas cap or coincidently one of your coil packs have decided to say goodnight
I was on the service ramp just before going over a heavy traveled bridge when the Engine warning light came. I was able to pulled to the side in a safe area. When I re-started the car the Engine warning light was gone and car seemed fine. Last night text SM who replied: Please bring it in.
Therefore, I am currently at the Mb dealership service having it evaluated and what code was set off. SA first thoughh, without asking, did I recently gas up the car.
So just waiting at the dealership to see what's what.
I was on the service ramp just before going over a heavy traveled bridge ehen the Engine warning light came. I was able to pulled to the side in a safe area. When I re-started the car the Engine warning light was gone and car seemed fine. Last night text SM who replied: Please bring it in.
Therefore, I am currently at the Mb dealership service having it evaluated and what code was set off. SA first thoughh, without asking, did I recently gas up the car.
So just waiting at the dealership to see what's what.
I was on the service ramp just before going over a heavy traveled bridge when the Engine warning light came. I was able to pulled to the side in a safe area. When I re-started the car the Engine warning light was gone and car seemed fine. Last night text SM who replied: Please bring it in.
Therefore, I am currently at the Mb dealership service having it evaluated and what code was set off. SA first thoughh, without asking, did I recently gas up the car.
So just waiting at the dealership to see what's what.
Hmmm that sounds like the fuel pump wasn't able to pump fuel at an incline, hopefully it was just bad gas and one off.
Update: MB tech. stated 2 ignition coils failed, (misfire in 2 cylinders) and need to be replaced. They are covered under MB warranty, regardless of warranty, for 100,000 miles.
After that the tech will see if any other issues need to be address regarding this issue. The work order included possibilty draining the gas tank.
. The SM stated the dealership recently have had cars coming on with misfires from the change from fuel grade winter to summer.
They were able to give me a loader.
So now just waiting for an update.
Update: MB tech. stated 2 ignition coils failed, (misfire in 2 cylinders) and need to be replaced. They are covered under MB warranty, regardless of warranty, for 100,000 miles.
After that the tech will see if any other issues need to be address regarding this issue. The work order included possibilty draining the gas tank.
. The SM stated the dealership recently have had cars coming on with misfires from the change from fuel grade winter to summer.
They were able to give me a loader.
So now just waiting for an update.
Glad you took it in then, good job and glad the cause was discovered. I am curious why it happened after fueling up, is there a chance the gas was one of the causes to the failed coils?
Glad you took it in then, good job and glad the cause was discovered. I am curious why it happened after fueling up, is there a chance the gas was one of the causes to the failed coils?
Thanks. My 2019 C63s coupe with 30,000 miles had the 5 year Service with Service A and spark plugs done about 3 weeks sgo at the Dealership.The car as always performed at top performance and was stunned when the Engine light came on yesterday evening.
Yesterday I had a 1/4 tank but decided to fill it up as I always do. At a busy Mobile station. After filling up the car I drove approx.4 miles and that's when the Engine light came on.
I purchased the MB Extended warranty but the SM said these are covered with or without a warranty for 100,000 miles. Good information for other members on this site to know.
Once I hear back I will update this site.
Thanks. My 2019 C63s coupe with 30,000 miles had the 5 year Service with Service A and spark plugs done about 3 weeks sgo at the Dealership.The car as always performed at top performance and was stunned when the Engine light came on yesterday evening.
Yesterday I had a 1/4 tank but decided to fill it up as I always do. At a busy Mobile station. After filling up the car I drove approx.4 miles and that's when the Engine light came on.
I purchased the MB Extended warranty but the SM said these are covered with or without a warranty for 100,000 miles. Good information for other members on this site to know.
Once I hear back I will update this site.
I see, hope you get the car back soon so you can enjoy it again : )
I purchased the MB Extended warranty but the SM said these are covered with or without a warranty for 100,000 miles. Good information for other members on this site to know.
Once I hear back I will update this site.
The ignition coils are covered with or without warranty until 100k miles? Can anyone confirm this?
It was solid. I shut the car off for a few mintures. When I restarted the warning was gone and had not reappeared. My car seems to be driving normal now.
. Maybe from downshifting?
Thanks for quick reply
This particular issue has happened to several of us. It happened to my wife’s car. Same identical thing. Pull over. Restart the car. Fault goes away and engine smoothed out. Of note this only happened on the Benz. Never the Porsche.
This particular issue has happened to several of us. It happened to my wife’s car. Same identical thing. Pull over. Restart the car. Fault goes away and engine smoothed out. Of note this only happened on the Benz. Never the Porsche.
I see that you like the Porsche more that you specifically have to mention the Porsche didn't have this issue : ) ?
I see that you like the Porsche more that you specifically have to mention the Porsche didn't have this issue : ) ?
The Porsche Macan has its own set of issues. Timing chain cover oil leakage, transfer case, and a faulty A/C line. That’s about it. The TC was given a 7 year warranty by Porsche. The TCC leakage can be fixed by swapping two bolts. In my case they dropped the engine and replaced all the bolts. Other than that it’s been solid at 77k on it. The C63S coupe was ordered and driven by my wife. Different vehicles different likes/dislikes.
This particular issue has happened to several of us. It happened to my wife’s car. Same identical thing. Pull over. Restart the car. Fault goes away and engine smoothed out. Of note this only happened on the Benz. Never the Porsche.
Did you ever determine the cause of the misfires? And did you bring it to MB Dealership service?
I had new spark plugs installed 3 weeks ago and my car, as always, ran great.
Howevrr this past Thursday evening filled the gas tank and within about 4 miles and 10 minutes later got the Engine warning light.
Currently at MB and initial evaluation: 2 misfired cylinders.
It appears this happened right after the car was filled up. Gas cap was secured.
04-25-2024, 07:55 PM
Can anyone confirm this?
