TLR;
Months of agonizing experience with my 2025 GLE450e PHEV repeat technical issues. Less than 3k miles driven, unable to fix the same issue even after the 4th time, around 3 cumulative months in the service center.
Long version:
Just sharing my agonizing experience with my new purchase. I got my 2025 GLE 450e PHEV in March 2025. I truly enjoyed it for the first few months until it became a nightmare that I am still dealing with for months now.
First incident - The air conditioning stopped working sometime around July/August. I had to leave it for repairs for about two weeks.
Second incident - Drove the car for a couple of weeks or so after the first repair. After a few days the engine warning light was back on. Back to the repairs for a week or so.
Third incident - The engine warning light went on again within 2 days and driving 20 miles or so. Back to the repairs again. This time for almost a month.
Fourth incident - I turn on the engine the same day for a drive and the light is back on. Air conditioning doesn’t work again. This time even my garage breaker keeps tripping whenever I try to charge my car. Sent it back for another repair.
Fifth incident - After over a month in repairs the issue is back the very next day I drove it again (today, 28-Dec). I’ll be calling them soon.

I have created a case with the MB customer service as well in mid-November. No resolution in sight so far, since the case is still within their 8 weeks assessment period. Unbelievable!
I feel this car is beyond repairs at this point. My journey with Mercedes-Benz has been extremely painful, something that I never imagined even in my dreams with such a brand. Honestly, the whole episode has shattered my trust on the brand itself.
Just thought of sharing my experience with the purchase.
I sincerely hope that you won’t have to go through any of this.
As for me, the agony continues. I hope to get this matter closed and put all of this behind me as soon as possible. At this point I think I am done with Mercedes

 

Sounds like you may be eligible for a Lemon Law exchange for a new vehicle. I would proceed with replacing the car immediately.

 

Three or so weeks ago a patient of ours was late...their GLE450e was dead (and I heard "totaled") on the side of the road due to the fuel in the tank going bad after the car drove itself only on battery for over a year. Seems to me that the PHEV functions from Mercedes are not ready for consumer use. And, so so so many issues with the 2.0 in cars I have personally seen.

 

I had the previous PHEV, a 2018 GLE 550e. It was relatively trouble free (except for the hard downshift problem which was fixed under warranty) It appears that Mercedes went backwards with the newer GLE 450e.

 

I’ve had my 24 450e for almost a year and a half. CPO with 12,000 miles when I got it. 26,000 miles now. Had the CEL light twice. One was the charging port door. Fixed the next day. Another was a battery overheating or something. The CEL came on. A restart and it was off. A software issue. Fixed in a couple of days. That was 9 months ago. No more problems.
I noticed that the author didn’t say what the CEL was for each time. Was it always the A/C?

 

I’ve gone 5 months without putting gas in. I heard the pressurization of the tank was supposed to minimize that scenario.

 

I don’t know much about the air conditioning issue, but I actually had the same engine warning light problem. I brought my car in a couple of times as well, but the warning light would come back on a few days later. I completely understand how frustrating that is.

In my case, I read somewhere that the warning light could come on when the car gets too hot. The dealer told me it was caused by some kind of air bubble, but I don’t really think that was the issue—because the warning light only appeared during the summer.

So, half skeptical, I stopped parking the car outside every day, cleared out my garage, and started parking it indoors instead. After a few days, the warning light turned off on its own. Since then, I’ve been parking in the garage consistently, and for the past two years, the warning light has never come back even once.

Hope this helps in some way.

 

I'd be adding fuel stabilizer

 

I would too, especially if your gasoline contains ethanol.
Pressurizing the fuel tank would probably reduce moisture buildup and reduce evaporation of the most volatile additives, but won't stop other chemical deterioration.

J D Power article:
How Long Can Gas Sit In a Car Before It Goes Bad? https://share.google/4RkgH4Hj8ygvZXlUb

 

First off, my 2024 GLE450e with 23,000 has been trouble free.

I do notice every week or so, even when in E mode, leaving my garage, my ICE will kick on for a few minutes before reverting to E mode. I figured it was supposed to do this to give the engine a short work out. I drive >80% in electric mode.

 

I learned something the other day that made me think. Porsche gives its customers a long list of things they must avoid with their new Porsche 911 GTS T-Hybrid. If you are not familiar with the T-Hybrid, it's a 400V mild hybrid system, so no PHEV. Don't know how big the battery is off the top of my head, but one thing that customers must avoid is park their cars in the sun where temperatures could exceed 30C (86F). That seems quite the restriction. I know EVs typically have battery cooling that kicks in even if the car is parked. Walk by a Tesla parked in the sun and you can hear the fans for example. But apparently, Porsche didn't add such a cooling system. Why is this not being talked about with other hybrids? I don't think the GLE and other hybrids have active battery cooling systems for when they are parked. They don't have very large batteries generally, so the energy needed to cool the battery could reduce the SoC quite a bit if parked for an extended period in the sun and what if there's not enough of a charge to cool the battery?

 

I have similar mileage on my 2024 GLE 450e and the engine never starts unless I want it to. If you kick down the throttle hard in electric mode....then the engine will start to assist with power....otherwise it you have to switch to "battery hold" "Hybrid" " Sport" to use the engine. The car is great, I only charge at home at level II and have not seen a gas station since Sept 2025. I monthly will run the engine warm when I do some highway driving...or will put in hybrid mode at higher speeds for better efficiency. What I don't like is the crappy Bridgestone Run Flat Tires that came with the car...not a lot of tire options for the vehicle, but will most likely move to Pirelli once these are done.

 

Are you planning the replace the tires with another set of run flats? I hate my Bridgestones as well. Considering replacing mine with Michelin conventional tubeless, not run flats.

 

I replaced the run flats on my GLE 550e with standard tires (Pirelli AS Plus 3). It made a huge difference in ride, noise, and wear. Bought a tire flat fix kit since the vehicle didn't have room for a spare.

 

I bought the slime repair kit...but still no jack in the car or even room for one. The biggest issue now is no storage for these items in the back of the GLE 450e...so, everything is sitting in the back hatch. With run flats I can then drive to a safe place to get the tires looked at by a roadside guy...and the kit if it could be temp repaired on the spot. Reviews on the Pirelli P Zero PZ5....have a self seal, so somewhat a run flat...plus a bunch of other new tech....make for the GLE as well....hard to find here, but I have my winter rims/tires on right now, so will be good until March to look at purchasing.

 

The pressurized tank is to address this specific concern. The sealed tank drastically slows down the aging process of fuel by preventing oxidizatoin and keeping mosture out.

While it slows down the process, it does not stop it.

If someone buys a vehicle with 60 miles of battery range, and is able to drive it for over a year on battery only, then with their range requirements they should have purchased an EV rather than a PHEV. That would have avoided a full second redundant drive system including the ICE engine, gear box, differential, gas tank, etc. A PHEV is for a specific use case, where a person does daily short range drives, but also does frequent if not daily out of city drives.

When chosing between ICE, Hybrid, PHEV, and EV you must consider and match your needs. In my case a PHEV fit. But if I was driving intercity every day, I would buy a Hybrid. Or if my daily drive was less than 300 miles, I would buy and EV (once the rate of technology change slowed and the resale value held better).

I think PHEV, and the GLE/C versions specifically are excellent products if they meet your driving needs.

 

On your comments.....to start with, my decision to buy the GLE 450e was made over two years ago, with a 6 month wait time for delivery. A lot has changed with EV's over this period, and they continue to improve with models we will see in the next year or two. So, my decision was based on wanting an EV....along with having a road trip vehicle and no range anxiety. This has proven to be an excellent vehicle from the choices available at that point. Today, I would buy a pure EV. Now over to the gasoline point you make on gasoline going bad...or that's what I think you're saying....well I don't buy a lot of gasoline for the vehicle, maybe half a tank every 3 months..no concerns on my part...just buy quality fuel. Regardless of one's driving needs, I would only recommend an EV along with home charging to my friends.

 

The point I would like to stress again, is the type of car depends on the person's needs. I cannot imagine recommending only EV's to all my friends, because some of them have more extreme requirements. While I am ready to buy an EV as my next car, it is only because I also own an ICE sports car, which is what I would use on a long distance road trip. My last one was 1 month and 6000 miles. Charging can be hard to find in many rural locations.

Similarly, I would be very nervous of relying on an EV in northern winter climate in rural areas. The range drops by 40% and the availability of chargers drops 90% and the risk of being stuck on a rural road in winter rises exponentially. That said, if I was traveling on a well known route, over a distance far less than the vehicle's range, with good communications, that is an acceptable risk.

 

I'm in a GLC. I switched to the Pirelli AS Plus 3S and purchased a spare wheel/tire kit from Modern Spare that I keep un-inflated and store in the underfloor storage area. I always keep an SUV jack in the back (doesn't fit under the floor in the storage area). Is there a storage area under the rear floor?

 

The GLE 450e has no storage below the deck...really bad design. So no room for jack, spare...etc. Think I'm stuck with run flats...just have to figure out the alternative to the Bridgestones, which I find rough ride and just don't like them.

 

In our family group...we have a Tesla Y and Rivian R1T....and living in Vancouver, there has been no issues with finding chargers for either on road trips...in fact it's getting better. I think in the USA they added an addiitional 15,000 chargers and more to come. For my friends who have trucks who need to tow...just not there yet.

 

In my town of about 20,000 people, they just added three new "fueling stations."
None of them have charging ability.
What that says to me is the majors don't think it's economically feasible to add charging stations.

 

We are building a new facility. The city was pushing (hard) for us to install a charger (on our dime) in our parking lot (close like the handicap spots). All else set aside...we do not need folks sitting in that spot for what ever time it takes (according to AI - 2:15 to charge their RV1+). We also do not want to maintain it or have any of our patients complain that this or that is not working (that is why they are at the facility to begin with).

Now, as a business owner and as someone who deals with the general population day in and day out...If I owned a gas station I want you on my property for no more than 15 minutes. Come, get your gas, buy a drink, go pee....leave. I would not want folks sitting there for an hour expecting me to have free WiFi a clean bathroom (two times) and what ever other thing. For that? Go use the stations at Target and wander the store while you charge.

I dont want one because we do not need folks around for that long.

 

The economics of public charging stations isn't really there. Many of them are loss leaders. Some business might decide to install a couple of chargers on their property to attract customers with EVs, or they get a tax break. The grocery store near my house has two 50kW chargers on their parking lot. The store doesn't manage them. They are ChargePoint chargers. I don't know how long EV owners spend in a grocery store, but it seems hardly worth it. Driving to the store, plug in the car, then buy your groceries for 10 minutes then load them and unplug the car. What's that on a 50kW charger? Half a mile of range added? On top of that, I often see the people who do charge there on their phone with customer support, because something isn't working. I walk by those chargers as I generally go there on foot.

One of the issues with EVs is the long term financial viability of the public infrastructure. Some of these charging companies will likely go bankrupt, or the cost per kWh will keep going up to the point where it no longer makes sense. With gas stations, people have to use them. There's no real viable way of fueling at home. Sure you can get barrels shipped to your place and pump it into your car, but nobody really does that, except for people like Harry Metcalfe who fuels his car collection with synthetic fuel that he gets shipped to his farm in barrels. But a (PH)EV is most viable if you can charge it at home, so the public charging infrastructure is for those who occasionally need to top off on the go or apartment dwellers that currently don't have the ability to charge at their building. That's just not really sustainable for a public charging infrastructure. It's kinda like your gadgets. You charge them at home most of the time and occasionally you need to top it off at your local coffee shop or at the airport, but it's a lot easier to offer a 110/220V outlet as that is there anyway, and we are not talking about giving away large amounts of energy, so don't have to worry about a payment system. It just gets rolled into the cost of doing business.

 

Harry Metcalfe is an example of a person who started as a laborer, saved money and built a fortune. Not surprised that he buys bulk. Harry's Garage, Harry's Farm on YouTube. EVO magazine.