My 2021 Mercedes-Benz G550 was built the first week of December of 2021. Delivery took on February 1,2022. This Mango Midnight Matte black Mercedes Benz G550 with a Platinum Nappa White Leather interior / AMG appearance package only has 4,650 miles.

While driving my 2021 Mercedes-Benz G-Class G 550 for approximately 8min. Preceding East on a 3 lane South Florida Highway going no more than 40 mph. Gas tank 75% full with V-Power From Shell. (filled-3 days prior). Proceeded from the middle lane to the right lane in-order to make a sharp right handed turn onto up coming Shopping Center, that was two lights away. I had turned on my 21 MB G550 air conditioner to auto (off prior). While I was attempting to switch on my turn signal the car suddenly turns-off completely in mid-drive. All warning lights illuminated, steering this 6,000 lbs Mercedes-Benz Beast of a SUV became extremely difficult, as I was already in the sharp right handed turn! I immediately switched on Mercedes-Benz hazards. I couldn’t apply my breaks immediately, because other vehicles were less then a car length behind my G550 in this single right handed sharp turn with no exterior lighting. I had to wait until my G-Wagon came to a complete stop on it’s own! It lost momentum pretty fast. If I would have panicked & had hit the breaks, I would have gotten into a very serious accident! Luckily, there was no one in front of my G 550 path! I then restarted my Mercedes-Benz-G, placed my 2021 G550 into drive! I proceeded to accelerate but my benz wasn’t moving! Less than 15 secs from the restart my Mercedes G550 jerked, then proceeded to get momentum again. G550 engine yellow light remained on until I got home! When I had restarted my Mercedes-Benz G-Wagon for the MBUSA tow truck, no engine light Illuminated! Then Decided to get towed in the am instead. Was extremely shaken-up, even hours later.

An hour earlier that evening, My Mercedes G Wagon was parked for about 8 hours. When I started my Mercedes-Benz G 550, it had died before I could close the drivers door!



After stalling while driving check engine light came on but soon will disappear when car is started again.

A month prior, with 110 miles less, my Mercedes G550 died twice in the same day while attempting to stop for a red light (Engine auto on/off was enabled) Then died again while I was attempting to park that evening. Check engine light remained on until it was restarted the following morning. No engine light remained on! Mbusa Dealership seen no faults!

1. Easy Entry doesn’t work! Only steering wheel moves not seat bottom or back.
2. Been stuck on over air update at 2% 23v since Sept 18.
3. Anyone Else Having Issues with your gwagon turning off while driving?

 

Some '21's have a bad batch of fuel pumps. My '21 G63 with 6k miles experienced similar problems. There is a handful of G550 and 63's at my dealer all waiting on fuel pumps.

 

had same ...its a sofware problem ... resolved with recall... search the forum

 

what did the dealer's service shop say?

 

Still waiting for an appointment with the local dealership!

 

apparently, my vehicle has no open recalls! I even verified this with MBUSA.

 

Had same problem with G63 only 4700 miles. Vehicle stalled with no warning. Luckily I was in a parking lot about 10 miles from the dealer. I called my service advisor and he told me bring it in now, If it's drivable! It will be about an hour to diag. Confirmed fuel pump was failing. They located a part that evening and I had the car the next morning at 10 am. My dealer goes the extra mile for service.
If I had to wait a week, I'd go ape **** on the service manager then call the GM. I'm sure you didn't have to wait a week to buy it.

 

said that I need a new fuel pump! They said they will call me next week with an eta on the fuel pump! So its been about two weeks with no car not even a loaner! Apparently the dealership doesn’t have any! I called MBUSA on the matter and they said they will be emailing the service manager. Still haven’t heard anything! Apparently im assuming that they are working on it! As my mb app is telling me that my car is unlocked!

 

glad that they were able to diagnose it quickly.
here in vancouver, when trying to book an appointment online I try to make bookings with several in the vicinity; some of them give you the loaner option online while some (especially the smaller dealerships) do not even have that option and you'll have to call and let them know you need a loaner.
take a screenshot of the mileage from the app, so that no one is going on joyrides :-) after it's fixed.

 

3rd week without an operational G-wagon or any form of transportation! Still no loaner/rental car provided! Not complaining just airing my frustrations!

MBUSA Customer Relations Supposedly Emailed The Service Manager at Mercedes-Benz of Delray last week inquiring on providing loaner/rental car assistance. Never received any communication concerning my inquiries from local dealership nor mbusa!

On Friday, my service advisor left a voicemail stating that my car will be ready this Monday at 3:30pm. Today, received voicemail from the service advisor at 9:30am requesting a return call with no further updates on my G550! I Reached out numerous times to no avail thru the day. 4:00pm received notification from Mercedes Me Connect that my G550 is unlocked & windows down.

Had called MBUSA earlier in the day, they advised that dealership should provide me with a rental car! That hasn’t been the case, so MBUSA stated to rental a car on my own and they will reimburse me. Yet when I had asked what is the dollar amount of MBUSA allotment per day, they instructed me to get the information from my local Mercedes-Benz Dealership or have them provide me with rental!

Since the pandemic, I’ve learned that there’re more important things in life. Look at our current events with all the devastation that the hurricane has caused! We are all doing our part to help others who have been affected!

With that said, my patients is running extremely thin! I’ve been very considerate, even with the amount of monies that was spent on this vehicle alone! Now, it’s interfering with getting back home to New Jersey. Which I haven’t been back since the start of the pandemic!

Has Mercedes-Benz been considerate to there loyal customers? Have they done their due diligence with manufacturing an adequate fuel pump? Have they conducted a thorough investigation on how many fuel pumps are actually affected? My build was 2nd week of December 2021, received at Port 3rd week of January 2022!

Mind you, that my Mercedes-Benz G550 vin is not on any recall list period! Yet, I’ve experienced fuel pump failures & Driver Seat Modules failures! How many more unsuspecting loyal customers are going to experience these serious defects!

I’m not exaggerating here! Having your brand new G-wagon seriously malfunction in that manner on a very busy FL interstate could have been catastrophic not only for me but for other travelers!

Honestly I feel like an idiot for spending 20k above MSRP. I had promised myself that I will never pay above MSRP for a car since spending 10k above sticker back in 2001 for my 2001 Mercedes-Benz CLK 430 cabriolet from Mercedes-Benz of Saratoga. When I had ordered my SLS AMG 6.3 GT (Contemporary Motors) and My 2016 AMG GT, (Rockvile Center-Mercedes Benz) I either paid MSRP or below! Remind you, they were both new to the Mercedes-Benz lineup!

I haven’t been in my G550 since that serious malfunction! I’m a little apprehensive about driving it! Maybe that will change but I don’t know if I’m able to trust this particular G550! What do you think? Should I Start Looking into Lemon Law?

 

Having been though the same ordeal, it is 100% dealer issue. My dealer had it fixed in 24 hours and I had a loaner. I'd call the parts department and confirm they have the fuel pump replacement. Is this the selling dealer? Call the GM as the service department could care less. Sales drive this business and a negative review has more weight than an email. Most hide behind email and don't want to be confronted.
You obviously are platinum customer based upon the list of cars in your signature. I give the GM one chance and then tell them politely I'm going to post this on MBWorld if it's not fixed in 48 hours.

 

something or the other breaks down every now and then, even if it were a formula one car and like @abhatti55 said here in vancouver too it's not uncommon to see newer Gs waiting for parts..imho not worth fighting with the dealerships or the service shop. you can always talk to the service manager and let him know your concerns. here in canada parts always have to come from toronto so there's always a wait time. I have 2 G63s and CEL is a pretty common thing..they are high maintenance for a reason

 

We just bought a 2022 G550 and it hasn't been a great experience so far. The car has about 1,500 miles on it and every few days will stall when driving. Usually it is after reversing out of a parking spot and placing the transmission in drive then it stumbles and dies. It always restarts immediately and drives without a problem. Sometimes the check engine light comes on and sometimes it does not. The engine light always clears after 2-3 trips when it does come on. We have had it in the dealer and they cannot reproduce the problem and the ODBII codes are not helpful apparently (P062700). They checked for a software updates and no newer version was found. The ran a fuel pressure test and it was within specifications. Any other experiences that may help us narrow down the issue?

 

So strange! The car stalled again today just idling in the driveway. It is clearly a fuel issue of some sort as the car sputters and feels just like we ran out of gas. It always restarts (fingers crossed) but does turnover a lot to re-prime the fuel system. Let me know if anyone else has had this experience and can give the dealer a place to start when I take it in for service soon.

 

does turning off the auto start/stop replicate the issue?

 

We are going to give this a try for a few days and see if it makes a difference. Thanks for the suggestion.

 

Well that was quick, the car stalled again today with auto start/stop disabled. Made an appointment for my dealer.

 

that definitely rules out the battery or something like a loose connection to the terminals..hope it's a minor thing perhaps like bad fuel or something..keep us posted

 

Forgot but does your vehicle have cylinder deactivation, wonder if that is causing it? Any chance it doesn't do it if it in sport+?

 

I’ll give sport mode a try for a few days and see if that makes a difference. Thanks for the ideas.

 

Hopefully that rules out cylinder deactivation, I just can't remember if your model has it.

 

I don't think this model has cylinder deactivation but even if it does, I tested the theory and it still stalled after starting it, putting it in Sport mode, putting the transmission in drive, then start to move forward, stumbled and dies. So not related to the drive mode.

BUT, things have gotten much worse now. Running errands and it stalled two more times idling in the parking lot waiting for my wife in the store, then on the road in traffic going 30ish MPH, the car lost power and would not accelerate then finally stalled. Feels just like a car running out of gas. While coasting, I pulled over in the right lane, turned on flashers, said a few bad words and turned the ignition off. Then tried to restart the car and it fired up after the motor spinning for 3-5 seconds. Got off the main road and drove into a nearby parking lot and it ran fine doing a few circles around the lot. As the dealer is closed today, decided to head home 6 miles away. Same scenario happened again, cruising about 30, engine lost power then eventually stalled. Turned on flashers and waved cars around me, then restarted the car and drove home without another incident. I guess the "good" news is the issue is happening more frequently so I shouldn't get a "we can't find anything answer" again from the dealer this time. Too bad, great car with only 2k miles on it but now things are getting serious shutting off in traffic.

 

Sorry to hear that. Hopefully the dealership can fix it for you the first try.

 

That's crazy--sorry to hear. Hopefully the dealer takes it in tomorrow and gets you a nice loaner (mine gave me an EQS 450+).

I'd probably brush up on the lemon laws in your state too just in case, but if it gets to that point I imagine Mercedes would buy it back.

 

Got the car back yesterday. So far so good. They had to replace the low pressure fuel pump that lives inside the gas tank.