All season tyres needed with 4 wheel drive?

[flowrider]

Very strange to have 21" wheels on a 4x4 and even stranger to have different width tyres, no way to rotate the tyres for even wear.

 

[ThinkPad]

Can see what been changed ?

I believe it was new 'steering knuckles'. I could see the shiny ne part when the car wheels were turned and I looked under the front of the car. It is well known and the dealer will fix under warranty if you ask them from my experience.

 

[Srdl]

Can see what been changed ?

There's pages and pages about the steering knuckle change on the GLC Forum - I’m sure the part number/recall details is in there somewhere if you have the time to trawl through it! It doesn’t apply to the AMG models but, fortunately, mine is so mild, and only in cold weather, that it isn’t an issue for me.