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I recently purchased a 2015 GL550 CPO, and the factory warrenty extension, so I have almost 3 years of coverage ahead of me. Now here is the problem. Shortly after purchase the check engine light came on. I took it back to the dealership and they told me the computer code said something about a misfire. I figured swap out a coil and we are back on the road. Well it wasn’t that simple. They pulled the engine, rebalanced it, and rebuilt one of the heads. It took three weeks. A week later the check engine light came back on, and the car died in the middle of the road. The screen said “do not operate”. So far it has been in the shop for another week and all they can tell me is they are still trying to diagnose the problem. The car has been in the shop for 4-6 weeks that I have owned this car. I feel like it is time to punt. Has anyone had success returning a car like this to an MB dealer? I know these things are high maintenance, but this is rediculous. Honestly, I love the car! I just can’t justify the lack of reliability.
I recently purchased a 2015 GL550 CPO, and the factory warrenty extension, so I have almost 3 years of coverage ahead of me. Now here is the problem. Shortly after purchase the check engine light came on. I took it back to the dealership and they told me the computer code said something about a misfire. I figured swap out a coil and we are back on the road. Well it wasn’t that simple. They pulled the engine, rebalanced it, and rebuilt one of the heads. It took three weeks. A week later the check engine light came back on, and the car died in the middle of the road. The screen said “do not operate”. So far it has been in the shop for another week and all they can tell me is they are still trying to diagnose the problem. The car has been in the shop for 4-6 weeks that I have owned this car. I feel like it is time to punt. Has anyone had success returning a car like this to an MB dealer? I know these things are high maintenance, but this is rediculous. Honestly, I love the car! I just can’t justify the lack of reliability.
Open a case with Mercedes. And worst case dont settle until they put in new engine, because they royally screwed up.
I bought my ML550 CPO. My CEL came on 200mi into my drive back home which resulted in a new ECU, injectors, wiring harness, and a fuel sensor. Took about 30 days plus a few more weeks to sort out a suspension issue and a tailgate lock issue.
In my case, MBUSA offered to make a payment for the month and ensured I was happy in a loaner. It was an inconvenience, but eventually everything was repaired and it’s been drama free for the rest of the time.
I don’t believe lemon law can apply since it is used (CPO) and the only reason I could see MBUSA making a buy back or buy out offer is if the dealership cost to repair exceeds the value of the car.
I’d call MBUSA and share your experience with CPO and ask how they can help. I’d also just let them sort out the car assuming you are in a loaner vehicle. I’ve been really happy with mine and I just hit 140k miles.
The dealer who sold the CPO car may have skipped some inspection items. Pretty sure mine did.
I bought my ML550 CPO. My CEL came on 200mi into my drive back home which resulted in a new ECU, injectors, wiring harness, and a fuel sensor. Took about 30 days plus a few more weeks to sort out a suspension issue and a tailgate lock issue.
In my case, MBUSA offered to make a payment for the month and ensured I was happy in a loaner. It was an inconvenience, but eventually everything was repaired and it’s been drama free for the rest of the time.
I don’t believe lemon law can apply since it is used (CPO) and the only reason I could see MBUSA making a buy back or buy out offer is if the dealership cost to repair exceeds the value of the car.
I’d call MBUSA and share your experience with CPO and ask how they can help. I’d also just let them sort out the car assuming you are in a loaner vehicle. I’ve been really happy with mine and I just hit 140k miles.
The dealer who sold the CPO car may have skipped some inspection items. Pretty sure mine did.
That is a good idea, I will call MBUSA.
As far as the Lemon Law applies to used vehicles, it has to be under the original factory warranty, which it is. Also has to have had the same issue three times or have been in the shop for the same repair for more than 30 days.
In order to qualify for arbitration, a consumer must ordinarily show either:
As far as the Lemon Law applies to used vehicles, it has to be under the original factory warranty, which it is. Also has to have had the same issue three times or have been in the shop for the same repair for more than 30 days.
In order to qualify for arbitration, a consumer must ordinarily show either:
The manufacturer or its representative has made at least three unsuccessful attempts to fix the motor vehicle; or
The motor vehicle has been out of service for 30 or more business days (cumulative) due to defects or nonconformities covered by the warranty.
It turns out the problem is a MAP sensor, which was incorrectly identified causing the motor to be pulled. Imagine that a cheap sensor causing $1000s in engine work.
Do you know the part number of the MAP sensor? Is it the MAF or MAP?
I have a same problem and my 2013 GL550 M278 engine is giving a misfire code for cylinder 5, and it disappears and reappears. I wonder if it is the injectors issue due to later GL550s having an updated injector.
Thanks
Originally Posted by GL550603
It turns out the problem is a MAP sensor, which was incorrectly identified causing the motor to be pulled. Imagine that a cheap sensor causing $1000s in engine work.
Do you know the part number of the MAP sensor? Is it the MAF or MAP?
I have a same problem and my 2013 GL550 M278 engine is giving a misfire code for cylinder 5, and it disappears and reappears. I wonder if it is the injectors issue due to later GL550s having an updated injector.
Thanks
Now that you mention it I think he did say it was cyclinder 5. And it did come and go initially. I am still waiting to get the car back, so I will know more hopefully soon. It is definitely the Manifold Absolute Pressure sensor that they are focusing on. He also mentioned something about a fuel flow abnormality, and believes it is somehow tied to that sensor.
Now that you mention it I think he did say it was cyclinder 5. And it did come and go initially. I am still waiting to get the car back, so I will know more hopefully soon. It is definitely the Manifold Absolute Pressure sensor that they are focusing on. He also mentioned something about a fuel flow abnormality, and believes it is somehow tied to that sensor.
fugggggg me! same problem here (among other issues with lock actuators and keyless go).
2015 GL550 CPO. took delivery Aug 2018. extended the CPO for the extra 2 years. check engine light came on about 2 weeks ago when wife was driving kids to school. it was gone on restart. it came on again the other day and I told her to take a picture of it (mainly because the service guy @ local dealership assumed i didn't know how to use a keyfob when I 1st brought it in for service - then gave me misinformation regarding the lock actuators). she said that she looked out at the road when the light check engine light came on. She told me that the car shook so much that she thought she drove over some road construction (or a body) and didn't see it. sadly, there was nothing there. it was the car. light was gone again on next start up. i had an upcoming appointment to re-fix door lock problems that had already been "taken care of", so i figured i would just tell them about the light when i dropped it off for service.
got a different service guy this time. he updated me the afternoon I dropped it off, saying that the check engine light was related to the 5th cylinder. he mentioned changing a spark plug and some other stuff, but he said "misfiring" for sure. he said that the foreman and another tech were taking the heads off/apart and he would call when it was all set. i didn't hear back anything later that night. i didn't hear anything back the next day.
i called him today to check. i was told that they are still working on it and waiting for parts. he said that it's doubtful that it will be ready this week. he will update me when there is anything major to report back.
d0c, sorry you are having this problem. In my case, the dealership ultimately fixed the problem by replacing the above mentioned sensor. Prior to that, they completely rebuilt one of the heads, and had the vehicle for more than a month. It seems to be a common problem, considering the comments here. However MB claims to have no knowledge of any defect. On the bright side my wife and I made a joke of it calling it the Mercedes of the week club, we sampled several different loaner cars from the lot! Our favorit loaner was the S550, and we took a long road trip in a brand new GL450. I am glad we didn’t buy a 450, as the 550 is so much better to drive. But with that being said, I also wish I would have spent a little extra and bought the GL63 AMG, but we are happy with the 550. We have had no additional problems with the car, so despite the early frustrations, we are very happy with it.
d0c, sorry you are having this problem. In my case, the dealership ultimately fixed the problem by replacing the above mentioned sensor. Prior to that, they completely rebuilt one of the heads, and had the vehicle for more than a month. It seems to be a common problem, considering the comments here. However MB claims to have no knowledge of any defect. On the bright side my wife and I made a joke of it calling it the Mercedes of the week club, we sampled several different loaner cars from the lot! Our favorit loaner was the S550, and we took a long road trip in a brand new GL450. I am glad we didn’t buy a 450, as the 550 is so much better to drive. But with that being said, I also wish I would have spent a little extra and bought the GL63 AMG, but we are happy with the 550. We have had no additional problems with the car, so despite the early frustrations, we are very happy with it.
thanks. i'll see what they come up with and post back when i have an update.
they have us in a gle350, which appears to be the equivalent of an acura mdx insofar as that it doesn't fit 3 hockey bags into the back very well. local dealership only has one gls450 loaner. i tried to book it and they said it's booked out well in advance. i agree on the gl63. if i were the main driver, i would have probably gone that way. wife doesn't seem to care about cars though.
So we finally got this issue resolved. Luckily we had aftermarket warranty on the 2013 GL550. After taking it to the dealer, they swapped coils and that did not fix the problem initially. However, after a further diagnosis, they deemed it to be fuel injector on Cylinder #5. They replaced the injectors with updated ones and check engine light was gone. Without the warranty, the fix would have been $1200.
So we finally got this issue resolved. Luckily we had aftermarket warranty on the 2013 GL550. After taking it to the dealer, they swapped coils and that did not fix the problem initially. However, after a further diagnosis, they deemed it to be fuel injector on Cylinder #5. They replaced the injectors with updated ones and check engine light was gone. Without the warranty, the fix would have been $1200.
I am curious, who do you have for aftermarket warranty?
so, i got an update from the service advisor - i called him, not vice versa. he told me that it was not our injectors or spark plugs. he said that they are replacing a "head". i have no idea what that is, but he said that they were waiting for a part to come in. He could not give me a timeline on the parts arrival or vehicle pickup, but did say that the engine has been essentially taken apart at this point. he made it seem like it was a big deal.
in his attempt to placate me - and just because i am a total moron in his mind, he actually said that the tech is even coming in of Saturday, his day off, to work on it. he did say that they have not worked on the other issues (lock actuators and keyless go) yet. ummmm, if the part's not here, and we don't know when it's coming, what's the tech going to be working on? maybe he's going to buff it out with a fine chamois for that 6-punch?
time in shop: 11 days
at this point, i have not questioned what specific "parts" they are waiting for, despite that i was told that they were waiting for parts 7 days ago too. i have started dictating my notes to keep better track of whom i spoke with, when and what they told me. i guess i'll give it another week and then find out exactly what parts were ordered, when they were ordered, from where, are they back-ordered, how many days they have worked on the car vs waited for parts, etc. sadly i've been through this before with a 2014 ram 2500 CPO that was lemon.
so, i got an update from the service advisor - i called him, not vice versa. he told me that it was not our injectors or spark plugs. he said that they are replacing a "head". i have no idea what that is, but he said that they were waiting for a part to come in. He could not give me a timeline on the parts arrival or vehicle pickup, but did say that the engine has been essentially taken apart at this point. he made it seem like it was a big deal.
in his attempt to placate me - and just because i am a total moron in his mind, he actually said that the tech is even coming in of Saturday, his day off, to work on it. he did say that they have not worked on the other issues (lock actuators and keyless go) yet. ummmm, if the part's not here, and we don't know when it's coming, what's the tech going to be working on? maybe he's going to buff it out with a fine chamois for that 6-punch?
time in shop: 11 days
at this point, i have not questioned what specific "parts" they are waiting for, despite that i was told that they were waiting for parts 7 days ago too. i have started dictating my notes to keep better track of whom i spoke with, when and what they told me. i guess i'll give it another week and then find out exactly what parts were ordered, when they were ordered, from where, are they back-ordered, how many days they have worked on the car vs waited for parts, etc. sadly i've been through this before with a 2014 ram 2500 CPO that was lemon.
ok, here are the sheets that the dealer gave me on pick-up. i have NO IDEA what any of this stuff is. should i be concerned about what was done/wasn't done in your opinions??
Just picked up the GL550 after a week of door actuator issues and check engine light coincidentally coming back on at the same time. They said the check engine light was due to Cylinder 5 misfire. After 4 days of diagnosis, the dealer claimed they found the injector "They installed last time"(Which was only 2 weeks ago), to be "faulty". Thus they replaced the Cylinder #5 injector AGAIN. Everything was no charge. Car is now home with no lights on.
I picked up a 2014 GL550 this past summer, recently the CEL light came on twice and it went into limp mode. Dealer replaced a faulty ignition coil and no issues so far.
ok, here are the sheets that the dealer gave me on pick-up. i have NO IDEA what any of this stuff is. should i be concerned about what was done/wasn't done in your opinions??
man that’s a lot of stuff to look over but looks like they tore the motor down and found the problem and it wasn’t too major. All the other items normal wear and tear. Assume key just needed to by synced back up. The seats really suck on “cool” certainly not Range Rover levels of cooling. Wish Benz would get better seats. Maybe newer cars are better?!?
The doors don’t lock themselves when you walk away you have to swipe on the handle to lock it. Why I have no idea as my Chevy Volt can just walk away and it locks. Why a 1 year newer $100k can’t do the same blows my mind.
Anyway hope GL is doing better now.
Last edited by black06c230; 10-09-2018 at 10:23 PM.
Update, still at the dealer. In my case, I would not recommend changing the fuel injectors as mine were changed 3 times at the dealer, 1 of which the dealer apparently "forgot to update the software" and check engine came back. After 3 times of changing fuel injectors, Misfire is still here. Another user described changing both MAP sensors but those didn't solve the engine misfire either. Full engine tear down to the "heads" is currently happening at the dealer.
I’m just curious of what eventually came of your repairs. I own a 2014 GL 550 and am having misfires on Cylinder 5. After having my car for a week, the dealership told me they needed to pull the engine ($5720) to determine if it needed a new head, which if that is the case will total about an $11,000 repair cost. What?! It has 72,000 miles on it. I don’t have an extended warranty. Why would I? It’s a MB and should go way past 100,000 miles before major repairs. I also had to replace the engine mounts at 52,000 miles! I’ll never own another MB again. Love the way it looks and drives but I had way better luck with my Yukon and Grand Cherokee.
I have a GL550 where the dealership determined it is a faulty engine - same misfiring on cylinder 5 and airflow and other stuff. What did you end up doing? Mine is no longer driveable, and the engine needs to be replaced.
07-17-2018, 07:55 PM
