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2020 GLC43 Tire info standard or run flat ?

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Old Oct 27, 2020 | 06:59 PM
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2024 GLC43
2020 GLC43 Tire info standard or run flat ?

Hello all,

I can't seem to get a straight answer as the dealership told me that I have run flats and the tire shops say they are not? I have a small spare tire in the hatch
I have these DUNLOP SPORT MAXX RT2 21'
  • Front: 255/40ZR21 102Y XL
  • 285/35ZR21 105Y XL
Is there a code on the tire ?

I guess it's somewhat important to know
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Old Oct 27, 2020 | 07:22 PM
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Originally Posted by aviator787
Hello all,

I can't seem to get a straight answer as the dealership told me that I have run flats and the tire shops say they are not? I have a small spare tire in the hatch
I have these DUNLOP SPORT MAXX RT2 21'
  • Front: 255/40ZR21 102Y XL
  • 285/35ZR21 105Y XL
Is there a code on the tire ?

I guess it's somewhat important to know
Above are not run flat tires. (Dunlop designation for run flat would be DSST on a sidewall which these tires do not have).
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Old Oct 27, 2020 | 07:51 PM
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Originally Posted by threeMBs
Above are not run flat tires. (Dunlop designation for run flat would be DSST on a sidewall which these tires do not have).
Thank you for that info 🙂
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Old Oct 30, 2020 | 02:01 PM
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i just got new winters on my 2020 glc43

End Proctoring- End Proctoring-

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Old Oct 30, 2020 | 02:06 PM
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Originally Posted by Mahnoodmobasher
i just got new winters on my 2020 glc43

End Proctoring- End Proctoring-
I was told to get spacers for the rear so that wheels don't look too much inward.
Would you have experience with this?

I am going with 19 wheels and 255/50R

Last edited by aviator787; Oct 30, 2020 at 02:11 PM.
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Old Oct 30, 2020 | 06:17 PM
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Originally Posted by aviator787
I was told to get spacers for the rear so that wheels don't look too much inward.
Would you have experience with this?

I am going with 19 wheels and 255/50R
Well 20 look kind of small from the back but its winter i can manage i would say 21 would look nice. I think recommended is 19 for winter i could be wrong
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Old Oct 30, 2020 | 06:24 PM
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Originally Posted by Mahnoodmobasher
Well 20 look kind of small from the back but its winter i can manage i would say 21 would look nice. I think recommended is 19 for winter i could be wrong
Yes 19's are the recommended wheels but the issue is that the are a bit to far inside so need spacers
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Old Feb 6, 2022 | 10:33 AM
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Have the 2021 glc43 amg with the stock summer tires and experiencing the same run around. Want to get them changed out to all season. No car shop near me will change them since they say it has run flats due to not coming with a spare tire. Can't find any info on these tires being run flats. The Mercedes in Bridgewater, NJ where I purchased my car said they are not sure if these are run flat and they don't come with spares.

I'm assuming next steps here is the get a spare tire with the rim from Mercedes and then go to the car shops and have them replace the tires ? Just odd since every tire place is telling me if it was regular tires then Mercedes has to provide a spare. Is this what everyone else is doing ?


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Old Feb 7, 2022 | 01:29 PM
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Have you found any all season tires to fit the 21" 2021 glc43? I can't find any even without runflat.. When I go to tirerack, tire buyer, discount tire, etc. I would love to know what is available to change out to in the winter. Thanks.
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Old Feb 8, 2022 | 11:07 AM
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I'll jump in on this thread and ask if anyone has found 20" all-season NON-run flat tires for the GLC43. Seems all I can find are winter or summer tires. I can't stand the harsh ride of the run-flats and have been looking for two years to find some all-seasons in both sizes (255/45R20 and 285/40R20)
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Old Feb 9, 2022 | 01:16 PM
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I have the 21" wheel package and cannot find any OEM sized all seasons, run flat or conventional. I have the same DUNLOP tires as the original poster and don't believe they are run flats when though I was told they were at the dealership. I bought a spare kit (Tire, Jack, lug wrench) off Amazon for $ 500. What I really want is a set of 21" all seasons for winter..
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Old Feb 15, 2022 | 07:44 AM
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A little information that may clarify for some...

GLC(s) came with run-flat tires with "MOE" on the sidewall. MB tires that are not run-flat say "MO" on the sidewall.
A lot of GLC(s) come with spare tire's now and they do not have run-flat tires. In the U.S. market, they have either run-flat tires or spare tire kits.
Some cars come with MB "Tire-Fit". Also commercially known as fix-a-flat. This is a little black plastic bottle under the rear cargo area floor. You'll usually see these in a GLC that came with 21" wheels originally (possible for other sizes too).
I might grab a GLC 43 with 21" Dunlop tires and that has the Tire-fit, but I don't additional information on the tires at this minute.

Hope this helped clarify.
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Old Mar 9, 2022 | 11:27 PM
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Can confirm this is incorrect. Live in NJ and my glc 43 amg did not come with run flats and also did NOT come with a spare tire kit. This car was bought from the mb dealer in bridgewater, nj which I would avoid. They are trying to tell me the 2022 models have fixed this issue when just a quick google seach can show it's just as bad. in 2022 glc 43amg models.

My car is currently experiencing extreme crabbing with skipping that feels dangerous especially in inclement weather conditions like sleet and icy rain. Does anyone know if the gle 53 amg model has this issue as well.
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Old Mar 10, 2022 | 08:02 AM
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You are correct. GLCs do NOT come with run flats in the U.S., and the AMG GLC comes with an inflator and repair kit rather than a spare-- they use MO or MO1 (not MOE) stamped tires, which are NOT run flats. As far as I know, only BMW subjects U.S. drivers to the horrors of run flat tires as standard equipment.
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Old Mar 10, 2022 | 01:32 PM
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My 2020 GLC 43 came with run-flats. Can either @4ringsnbr or @glc43amg-driver tell us what size rims and tires you have (both front and rear), and tell us the brand of tire they gave you? If there's a chance I can replace these awful run-flats I want to know!
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Old Mar 10, 2022 | 02:31 PM
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You don't have run flats-- they're not on the 2020 GLCs... My 2020 GLC 63 has Continential Sport Contact 6 tires 265/45R-20 in front and 295/40R-20 in rear. If you look on your tires, you will have an "MO" or "MO1" designator behind the size of the tire to indicate Mercedes OEM. "MOE" designator is for run flats, but as far as I know, they aren't offered as standard on GLCs in the U.S.
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Old Mar 10, 2022 | 03:25 PM
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Originally Posted by 4ringsnbr
You don't have run flats-- they're not on the 2020 GLCs... My 2020 GLC 63 has Continential Sport Contact 6 tires 265/45R-20 in front and 295/40R-20 in rear. If you look on your tires, you will have an "MO" or "MO1" designator behind the size of the tire to indicate Mercedes OEM. "MOE" designator is for run flats, but as far as I know, they aren't offered as standard on GLCs in the U.S.
I hate to break it to you, but yes, I have Goodyear Eagle Sport run-flats that were delivered standard on my car, as do many, many other GLC 43 owners. Mine are 255/45R-20 in front and 285/40R-20 in back. Maybe I can fit the Contact 6 tires in the wider widths you were given on my rims, but I can't say for sure. At least that's something for me to go on. But please stop saying Mercedes didn't issue run-flats as standard, because they did (and perhaps still do). You're working on bad info I'm afraid.




EDIT: Adding a screenshot from my original build sheet, dated December 2019. I was not given any option other than run-flats - this was the only choice.



Last edited by Tim_P; Mar 10, 2022 at 03:42 PM.
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Old Mar 11, 2022 | 12:09 PM
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Originally Posted by Tim_P
I hate to break it to you, but yes, I have Goodyear Eagle Sport run-flats that were delivered standard on my car, as do many, many other GLC 43 owners. Mine are 255/45R-20 in front and 285/40R-20 in back. Maybe I can fit the Contact 6 tires in the wider widths you were given on my rims, but I can't say for sure. At least that's something for me to go on. But please stop saying Mercedes didn't issue run-flats as standard, because they did (and perhaps still do). You're working on bad info I'm afraid.

EDIT: Adding a screenshot from my original build sheet, dated December 2019. I was not given any option other than run-flats - this was the only choice.

Mine came the same way with the exact same tires. 2022 AMG GLC 43 with the 20 inch rims (night package). If you think that ride is harsh, spend some time in a C63 with stock tires!
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Old Mar 12, 2022 | 12:58 PM
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Ditto "I Love ICE" 2021 GLC 43 same 20" wheels and "run on Flat" all season tires. I also agree with the E63, drove one for a while love the V8, could not deal with the ride, plus I thought the interion wasn't as nice. I too am looking to replace the tires. I run them at 30 psi, if they go faster good!
Update: I should have mentioned that since I was able to order and spec the car I specifically got the 20" wheels and ordered the spare tire package with the intention of dropping the "MOE"'s for tires with higher side walls and not as stiff as the run flats.

Last edited by bsaz; Mar 14, 2022 at 12:46 PM. Reason: Update!
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Old Mar 12, 2022 | 01:53 PM
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I have 21"tires on my GLC43. Mine are Dunlop summer tires that aren't run-flat and it did not come with a spare tire.

The argument of whether they come with run flat tires is not answered as "I have these, so they don't come with that"...
They came with run-flat all seasons, summer tires without run-flats, tire fit & compressor, or spare tire kit. These also depend on tire sizes that were chosen.

hell, they probably have a few other options that are based on where you live. 😆

This is how it is in the US market at least:
If it came with a spare tire, you lose the underfloor storage area and have a 'donut' spare with tools (collapsible basket didn't fit under and will be in cargo area).
If it came with run-flats, you have nothing and it's a regular storage area with collapsible basket/1st-aid/ net/etc.
If it came with tires that are not run-flat and without a spare tire, it should have come with a bottle of tire-fit (fix-a-flat) and a compressor. It is possible that someone (usually a sales person) at the dealership took from one vehicle and put in another that was missing it... see this too often with removable items and they 'forget' to replace it...

Also, I'm not sure about this, I guess it could be possible to have a collapsible spare tire, but I haven't seen a vehicle come with one of those in several years.

Last edited by redsly; Mar 12, 2022 at 02:17 PM. Reason: Was busy IRL and missed a few things.
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Old Mar 13, 2022 | 06:34 AM
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My car is the GLC 63s Coupe with 21” summers - staggered set up; with a separate 20” square set up for winter. I DESPERATELY want to take off the summer 4s performance tires and replace them with all seasons too but…BUT, F’ed if I can find ANY that matches a staggered set up. You’d think amongst ALL the companies manufacturing/ selling tires, one of them would!?


Originally Posted by Tim_P
I'll jump in on this thread and ask if anyone has found 20" all-season NON-run flat tires for the GLC43. Seems all I can find are winter or summer tires. I can't stand the harsh ride of the run-flats and have been looking for two years to find some all-seasons in both sizes (255/45R20 and 285/40R20)
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Old Mar 14, 2022 | 11:46 AM
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2022 GLC 43
Run Flats

I have a 2022 GLC 43. It has [size=13px]R02 All-Season Tires and [/size][size=13px]R66 Extended Mobility Tires[/size]
on the spec sheet which are the dreaded Run Flat Goodyears. We live in a remote Utah area so the run-flats might have some safety value but they are harsh riding.
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Old Mar 15, 2022 | 02:11 PM
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Originally Posted by Bloom_Phaze
My car is the GLC 63s Coupe with 21” summers - staggered set up; with a separate 20” square set up for winter. I DESPERATELY want to take off the summer 4s performance tires and replace them with all seasons too but…BUT, F’ed if I can find ANY that matches a staggered set up. You’d think amongst ALL the companies manufacturing/ selling tires, one of them would!?
There are plenty of options in the US.
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Old Mar 17, 2022 | 01:36 PM
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What options? I had to buy tires last year and the only ones I could find were the overpriced MO at the dealer.. No one else had those sizes. Every now and then discount or tire rack has a set but it looks like right now, they are out again. My car came with 21” Contis non run-flat (MO) and it has the air compressor and fix-a-flat.
255/40 R21 & 285/35 R21

I’ve read that other people are putting Pilot Sport 4S 265/40R21 in the front and the 295/35R21 in the back. They seem to last a bit longer. I’ll give it a shot once these contis are done.
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Old Oct 3, 2022 | 01:24 PM
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Hi All,

I've noticed some of the 43's with the 21" wheels are coming with Continental Summer tires and then some with the Dunlop Summer tires. Is there a reason why or region specific? If given the option, I think I would request the Dunlops due to the longer wear rating and I prefer the sidewall on the Dunlops.
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