Hi MyMerc,
Welcome to the club.
The GLC's in Oz get delivered with a variation of tyres. It's difficult to answer your question, as the factory may have different combinations in the supply chain now as to some in the past, even if same tyre brand/model.
The number of folk that have posted about crabbing issues is relatively small, and each one has different tyres, sizes and from different parts of the country.
From my readings, the factors that can contribute to the Crabbing issue are:
1. Model of vehicle - GLC petrol appears to be less affected than Diesel. (each engine type has different Torque split front to rear), GLC43 appear more susceptible. My Petrol GLC...notice it very minor just after delivery, only at full lock ...now almost don't notice it.
2. Tyre Brand/model - some more representative than others, Very generalised -Pirelli worse, then Continental, Bridstone better.
3. Tyre Size - 18,19,20 ..larger wheel generaly worse.
4. Air pressure in tyre.
5. Ambient Temp
6. Amount of wear on tyres ..sometimes gets worse with wear.
7. Wheel alignment - may vary from factory, some cured after wheel alignment.
8. Even given all above being same, some vehicles still appear worse than others.
Wait till you get the vehicle, drive it and evaluate. If it grates with you badly ...make a big noise to your dealer ...although there was significant push back ...seems that they are now willing to look at alternatives.
The Oz forums at :
-- forums.whirlpool.net.au/forum-replies.cfm?t=2621052&p=81
....come join us.
..have a lot of local nuts, sorry strike that , enthusiasts.
Poster, Techno has been follow up on tyres a fair bit ....to counter crabbing issue.
A copy of one of his posts here.
Trial shipment of Goodyear Eagle Sport, RFT, ALL Season, M&S, 255/45R20 fitted to GLC last Sept. 90% improvement immediately coming out of winter into Spring. Summer has been good, about to head into Autumn, real test will be Aussie winter and cold wet mornings with U Turns and right turns around roundabouts.
All Season tyres very difficult to source and my guess is those designs that are working will see extreme shortage with Tyre manuf being unable to supply demand. Volume numbers in MB unique sizing will not assist.
Found same Goodyear’s fitted to GLC43 in Hawaii, new on dealer floor....... Hawaii does not get as cold as Oz or UK, but an be very wet, so I guess our US cousins are getting an allocation when built in Germany.
I have done around 8,000km I think and tread wear down from 7mm to 5mm approx; wear bars kick in at 1.5mm. Rotating around 8,000km.
Tread wear rating is 560 I think, Pirelli Scoprion Verde, summer tyres was 400 tread wear; I got around 42000km from them, allowing for tread depth when I had Goodyear’s fitted. Hopefully the Goodyear’s will last more. In USA these have a 50,000 mile g’tee, we do not have such warranty here in Oz.
Hope this helps – All Season tyres seem to be the reasonable workaround. We do not have the Vredestein tyres our UK cousins have to evaluate, they too seem to be getting good reviews.
I may be able to help have some of these (Vredestein) imported as a pallet load, but need to do far greater research before committing and going into partnership with one or two other GLC owners and the Agent.