MBWorld.org Forums - GLS Class (X167)

Is this the right group to be in

Jay450 — Sat, 02 May 2026 11:56:30 GMT

Is this the right class to learn about the current GLS450? Looking to buy one and want to make sure I make right decisions etc. Also just side note, with excellent credit and zero issues on driving record what's typical auto insurance cost? I figure $2-300 month for new and full coverage.

Waze issues

lungs414 — Mon, 27 Apr 2026 12:39:53 GMT

It seems the last few times I have driven the Waze map is screwed up. Either it freezes or the arrow is off the road I am driving on. I rebooted my iPhone and that doesn't fix it. I wasn't sure of how to reboot the vehicle so IK pulled over and shut the car off, locked and unlocked it then restarted and it was working again.
Seems to be happening more and more lately. Anyone having this same issue? And suggestions......

2027 GLS Plugin Hybrid?

Scott Schmidt — Sat, 25 Apr 2026 12:45:50 GMT

Hi Folks - I've heard that the 2027 GLS will be available in a plugin hybrid version. Can anyone confirm that this is correct? Maybe time to upgrade!

Rear Inner Door Panel Loose/Not Clipped in

alanme123 — Thu, 23 Apr 2026 04:01:10 GMT

Hi All,

I have a 2020 GLS with the sunshades and on my driver side rear door, the interior door panel trim is not tight fitted. You can see the comparison between the two photos that there is a gap on the left door, but if the panel is tight fitted on the right side door. I have extended warranty, but the last time I went in they said that interior trim is not covered under the extended warranty and was asking for a 3 hour diagnostic fee + any additional time/repair costs. I feel like this is going to cost me over $1k to fix at the dealer where it probably is a trim clip that might be broken or something that I can do myself.

I really need to get this fixed as my toddler is putting stuff inside and is starting to jam the sunshade. I've gotten the items out and it works properly for now, but I am curious if anybody would know for sure if this is covered under extended warranty. If not, does anyone have any instructions from WIS or have any idea how i can take the door panel off and hopefully replace a clip or something? Any insight would help.

Thank you!!

Transmission mount

nc211 — Mon, 20 Apr 2026 12:03:00 GMT

Don�t think we have to worry too much about a failing transmission mount in these cars. This is it. This is mine after 6 years and 95k miles. They couldn�t have made it any easier to replace too when the time come. Still looks new�

Low speed groaning / turning

nc211 — Fri, 17 Apr 2026 21:04:46 GMT

I am making this thread for anyone who may have this issue in the future and uses the search option for the symptoms. If this is you, this thread is born out of this one after going down the rabbit hole: https://mbworld.org/forums/gls-class...luid-type.html

Mine: A 2020 GLS 450, owned since new, 93k miles (today - April 2026). All fluids/filters/plugs changed at 50k tip to tale with MB fluid in 2022. Never towed anything. Always garaged and pampered, so much so that rarely has ever seen 4k RPM. It does not have the off-road+ package (other than off-road setting in the menu that lifts it up, which we all have as standard).

Symptom: At parking lot speed, or accelerating from a stop in a turn (like at a stop light) - a humming noise from what sounds like the rear / center of the car. The sound fades away as the car straightens out, and is not heard when at speed while making turns. One would automatically assume the rear differential.

The outcome (likely): The conclusion to my journey ended up being the transfer case, and have learned today that is a relatively common issue known by Mercedes Benz on my car. I am not sure if this applies to later model years of the X167 platform (and GLE sister). It's not a common topic at this point on the boards.

The cause of the noise is the clutch packs in the transfer case. They are slipping with the strain during the low speed turns. The rear differential is not a limited slip setup in the normal 450 variant (only the AMG version is the limited slip differential). BUT, the transfer case IS known as a "limited slip" setup, with clutch packs that move the power front/back in the driveline in real time. Some note the transfer case as the "center differential".

The remedy: As of current, there are no repair "kits" available for the fix. Instead, it is a new transfer case in its entirety from Mercedes. My quote today for a new one was approximately $8k for just the part.

Our conclusion: Ignore it until it really becomes a problem. You'll know it's a growing problem if the sound starts to happen when going straight, or you hear clunking / banging. But a slight humming noise on hard turns, is just the clutch packs slipping a bit. It's not going to leave you stranded.

Mercedes: Perhaps Mercedes will acknowledge the issue and issue an extended warranty for the part. Don't hold your breath however. To replace the transfer case today, means putting in the exact same part that is failing in your car again, meaning it may do it again. Until there is a revised transfer case developed, it is a waste of money to replace it, in my humble opinion.

Feel free to read the other thread, but the conclusion to the issue was not the differential, or the brakes, or tires. It was the transfer case.

Transmission Issues

WhatsInaName007 — Wed, 15 Apr 2026 02:19:54 GMT

I purchased a new 2026 GLS 580 in February (just came off the truck with 5 miles on it) and it is completely undriveable in Comfort mode due to extremely harsh downshifts that shake/jolt the whole car. It happens at low to moderate speeds. If the car wasn�t brand new you would think it needed a new transmission. Today, with only 3,400 miles, the check engine light came on as well.
This is just a few of the many issues I�ve encountered so far. Anyone else experiencing this?

2021 GLS450 Spontaneous Combustion

PotatoHeadII — Sun, 12 Apr 2026 14:04:39 GMT

22" square set up for GLS 63

Young04 — Tue, 07 Apr 2026 00:31:13 GMT

I know a few people run square set ups (usually 285/45r22) for winter, but anyone do this year round with all seasons? I am more curious about whether there is any sort of downgrade in performance. My OEMs are 22s.

I ordered a set of 22x10 wheels with +23 offset at the rears. Originally, I was going to use these as my winter set with winter tires, but now I am wondering if I should just do all seasons and run them year round. Anyone do this and can comment on performance? Also, not trying to invite discussion on all season v. winter tires - I fully understand that aspect of things.