Does anyone have a summer set that doesn’t crab?

 

I am running the PS4 with 21in set up. I haven’t really noticed it happening I am however located in San Diego where it doesn’t get too cold at all. These past few weeks it has been raining and it has happened but only when wheel was fully locked. Other than that I haven’t noticed it during non wet times here.

 

I saw this petition and it gave me hope that it could be reduced just by replacing the Continentals. He seems to blame a combination of dodgy engineering combined with the Continentals tyre tread.

https://www.change.org/p/mercedes-be...des-benz-c-glc

 

Gives me hope (and an excuse to buy PS4s)

 

Which Conti's do you have? Did anyones come with the SPORTCONTACT 6?

 

She came with ContiSportContact 5P

 

Yep. This is correct.

Mercades gave us is a tighter turn radius which on a non open diff AWD vehicle will cause the crabbing. It’s not a big deal. If someone hates their car because of it just stop turning to lock. You surely won’t complain if you find yourself on ice or mud or sand!

 

Sadly I have 21" Michelin PS4S on my GLC63 S. There is very noticeable crabbing on my car at full lock.

 

My wifes Porsche Macan has Michelin PS4S tires and none of the crabbing issues. Mercedes needs to pull their heads out of there asses and redesign this obvious defect.

 

I just wish Mercades would educate its drivers.

Something like we have a tighter turning radius than the Macan which we decided is worth the crabbing in case you really need to make that extra tight turn. We expected our more wealthy customers to be intelligent enough to use the camera system to see how much they need to turn the wheel but just Incase we gave them a farther lock to lock but likely no one will need to go all the way to lock to complete their turn but sacrificing some crabbing on our 21” rims is worth it over doing a three point turn. Surely our customers are smart enough to understand that another car with 19” wheels (read: more tire flex) and perhaps not as wide tires with a larger turn radius will not be seen as a better car because they should have an education and General understanding of engineering!

Low and behold mercades overestimated.

The macan with the largest tires and 21” wheels crabs too.

 

Not that I have personally compared the turning radius of the 2 (doubt you have either) , but a quick read of a review stated that they had the same turning radius which I believe, as I have driven both and our Macan turns just fine. Your other comments while an attempt to be "smart" just fall flat. Neither the Macan nor the GLC are geared toward "the wealthy" customers. They are both at the lower end of both brands so please save the sarcasm. ets move on. Many of the people complaining have 20" rims. This isn't just a 21" issue. In my case , I put on some 20" BBS rims with 265s in front and 295s in the rear. No crabbing at full lock. I'm also a Mercedes owner so I'm not simply trying to knock the brand, just stating facts. I actually was going to purchase a GLC63 before reading about this issue which is completely unacceptable IMO. Your views may vary....

 

Just did a quick search. Looks like the turning radius for 2019 43 and 63 is 39.7ft. 2018 was 38.7 for the 43. (From Mercedes corporate websites) I wonder if it was changed as a "fix" or if it's a typo.

That said, Macan S is 38.7 Turbo is 39.2 Stelvio is 38.5.

Personally I've had very little of it with factory 20" all season runflats (Only occasionally on full lock, nothing to be annoyed with tho) Maybe I'll be complaining when I put summer tires on, lol.

 

You tube Macan crabbing. Then you might want to remove this post....#avoidFakenews

 

Ok. Searched Porsche Macan crabbing and 2 of the first 4 videos were GLCs crabbing!

 

I guess all that over pricing of their cars allows them to get their negative vids removed/buried 🤣. There are threads here with a post of a Macan jumping all over the place and commentary about it happening during aggressive cornering too.

If if I have some free time I’ll post it in this thread...or if you’re interested you can find it.

 

Haha! Thats alright I'm not really interested. Mine doesn't crab, maybe with 21s it would.. I drove SQ5s as well and didn't notice it but whatever. The overall sentiment here is that there is a pretty major issue with the GLC. You want to defend it go ahead, I'm just that big of a fanboy for any car maker.

 

I have a set of OEM 20” and OEM 21” with summer tires. It’s been in the 50’s and thankfully I’ve had no crabbing. Definitely an issue, not universal as is the case with the Porsche from what I’ve seen.

 

Wealthy customers was incorrect. The GLC 63 has a lot of the GTs R&D applied to the 63 variant of the GLC in the engine transition and suspension.

You used tire diameter on custom rims to compare the GLCs tire stutter. It’s width matched to the lack of side wall flex due to large rim that exacerbated the issue.

Porsche has a bad history of AWD tire judder
my anger with lack of drover education is it’s a give take world. I want wide tires nice tall rims and a tight turn radius. Any AWD veh has tire skipping issues unless the manufacturer just limits the lock to lock to exclude judder. I’ll take parking lot judder for when I need to get out of a tight parking lot. I could choose a wide turn radius but I don’t want that. I could choose smaller rims but I don’t want that. I could choose narrow tires or winter knobby tires but I don’t want that either. If you understood AWD vehicle mechanics you’d understand that MERC gave us a nice tight parking lot turn radius over wider radius and no judder. That’s the problem as with all things people ***** then a manufacturer removes qualities of something because the mass of people *****ing don’t know w t f they’re talking about.

 

this is most definitely not an education issue. most of us have had performance vehicles from other manufactures. my crabbing happens even when i am not full tilt. i do not cpmplain about it much because it never happens on my 22" wheels which I commute in. mind you the 22" wheels still have 265 width tire in Conti DWS06.

I just ordered another set of wheels and i'll run 20" Michelins on them. I suspect the issue would be absent on those.

 

YES! I want to voice my disillusionment with the car salesman knowing full well that I wanted a 4WD - both cars I have bought from him he knows my snow driving apprehension. (Being from Miami) so I’m shocked he didn’t mention the Summer Tires! I waited two months for its delivery instead of taking one off the showroom floor of lesser price.

But really, much darn research can one do on a car? I learned now that you can’t even trust MB to have high standards and decency.

And some of you state that is a flaw in design? Isn’t that huge? And that other models have this issue? Isn’t that reason to have a class action suit? Of course only the lawyers would profit.

I feel duped and all the more when I read that you live in Florida and it’s hot as hell and you still have crabbing with the tires.

Why didn’t I find this forum before I bought it? Oh yeah because I had no idea what to google before actually experiencing the thumping when I turn out of any situation in my fancy MB clunker.

 

I hated the crabbing issue and after talking to my porsche dealer it seem to be a problem with all the fat tire cars with summer tires.
Only happens in colder weather.
If you go one size bigger on the tires you can buy all weather tires that cure the problem.

 

My 2018 GLC43 with 21" Contisport Contact summer tires had pretty significant crabbing at full steering lock under all temperature conditions, and the outside edge of both front tires was gone by 10,000 miles. I replaced the Contis with the same, but had the toe checked and aligned (didn't get before- or after-readings). The new tires now have 15,000 miles on them (25K total on the car) and the new Contis are wearing much better. I do get some crabbing and juddering under cold/wet conditions, but it's nowhere near as bad as it was initially. Oddly, my car is one of the very few that does NOT squeal its tires going around the tight corners in the parking garage I use.

Theory: if there is too much positive CASTER (top of strut leans too far backward toward the rear of the car), then at full steering lock, the inside tire would be pushing more or less sideways due to its tighter steering radius, and the outside edge of that tire would especially get the brunt of the abrasion. The pressure on the edge of the tire would be compounded even further by the extra low and stiff sidewalls on 21" tires. Just thinking as I type, but increasing the tire pressure to near maximum specs might distribute some the pressure away from the sides and toward the center of the tire.

Anyone's thoughts?

 

Costly, premature edge tire wear, tire crabbing.

Reality is there is no "Camber" adjustment to change tire contact angles, spread load more evenly.

No adjustment to change "Caster" settings.

"ALL THAT IS AJUSTABLE OEM" IS BASIC FRONT AND REAR TOE "DIRECTIONAL" ADJUSTMENT!

It is all to do with cost savings and ever increasing speed of auto assembly lines.

We saw the need therefore to re instate once again from the early 90's full, precise adjustment.

Front Camber and Caster. Rear Camber (with extra Toe adjustment to compensate for the new rear Camber facility).

OWNERS ADVISING NOT ONLY HAS THE COSTLY PREMATURE EDGE TIRE WEAR ISSUE BEEN RESOLVED...... but the new "adjustability" of both front Camber and Caster has allowed to either noticeably improve or fully resolve the crabbing / tire squeal.


Kits are designed to simply replace the highest wearing bushings at the same time. Precise single wrench adjustable.

GLC C253/X
FRONT KITS:
1. #503316-2 J $380 (Both Sides).
Front upper / inner bushings. Designed to fit without arm removal. Bush extraction tool supplied. Up to 1.5 degrees Pos. or Neg. adjustment (the one offset fluted bolts which are not available for the GLC only provide 0.3 of one degree 1/8").

2. #503316-3 N $695 (Both Sides)
Front upper "replacement arms" up to 2.5 degrees Pos. or Neg. Hi - Strength forged alloy arms same design as OEM (Not welded / fabricated steel).

3. #503416 K $480 (Both Sides)
Front "lower arms" '4' highest wearing bushings. Camber provides 1.5 degrees Pos or Neg while the forward facing thrust arm (Caster) bushings 2 degrees. Caster bushings are also Mono ball / 2 Axis design significantly improving brake and steering response.

REAR KITS:
4. #502226 K $480
Lower arm inner bushings 1.5 degrees Pos. or Neg. Plus extra 'Toe' to compensate for the new rear Camber facility. Advantage of "lower arm" adjustment is retaining important clearance top of tire to outer fender when wanting to resolve premature inner edge tire wear.

Delivery $40 one kit ($60 F/R)

 

I bought the car last February, I heard the noise every time I pulled out of the garage. I complained to the Dealer in Windsor Ontario. They said the tires all seasons. They did not give me an solution to the problem. I have It is really bad on wet and cold conditions. Any suggestions 21 conti

 

I had the same issue with my 2019 GLC 43 with 21 inch Contis every time I pulled out of driveway in reverse. Got worse when the wet and cold season started. I replaced them with Pirelli Scorpion Zero All Season tires and haven’t had the issue since. They are not exactly the same size, but I haven’t noticed any issues, though YMMV. Bought them from Tire Rack: