PS Pump is failing and I'm under warranty, but...
 

I'm running 265s in the FRONT. Anyone with wider tires run into this before and still had the dealer cover it? I've got to take it in either way, but I'm just hoping not to pay. I know how picky they can be.

They may not even notice the larger tire sizes. Good luck with it though.

They're on 19" Forgestars, so they'll definitely notice! It's got to go in either way, but just curious if anyone else had ever run into this.

LOL then my fingers are crossed and even better luck. I don't see why tire size will affect warranty but then I don't know how strict they are over there. It's not the tires that made it fail. Am sure you will be fine.

Unrelated question... WHY?

265s would kill steering feel and responsiveness and unless you are on the track all of the time, would provide little to no benefit (and even then I'm doubtful they would actually be a good thing). Bigger isn't always better (well, sometimes it is :D)

Bought the car with them on it, and I couldn't agree more. They'll be replaced with 245s when I swap tires out. The reason I posted is because I'm considering getting the tires swapped before I even take it in.

Aren't stock 235s? In that case if the dealer was going to hold it against you and void the warranty, wouldn't that even be the case with 245s?

Probably a little more lenient on +1 sizing than +3, I'd assume anyway. Anyone in the Seattle area want to let me borrow their stock wheels and tires for a day!? :D

Agreed... they would not even notice 245s. The dealer installed my 245s and could care less. 265s are so big they would MUCH easier for the dealer to try to claim they played a part in the failure (rightly or wrongly).

Personally I think if the dealer is trying to scam a customer for void warranty then they would definitely check tires on a non OEM rim. They will probably be trained to do this if the dealer is really a scum bag. I doubt that's the case. I guess if they wanted to, they could claim non OEM set up and screw you but they'd have to be pretty bad vermin to do that. That said, I don't know how it works over there.

Yeah, if they wanted to they could claim the larger contact patch put additional stress on the pump. Which, hell, they might be right, but with 27k on a 2011, that's pretty far fetched. This will be my first warranty claim with Mercedes, so wasn't sure what past experience were.

If you have problems with this just go to another dealer. There are known issues with the p/s on c classes anyway. I doubt there will be any issues. There are a few techs around that like to make a big issue out of things that are not factory but for the most part it should not be an issue. If you are having problems give me a shout and I can point you in the right direction.

c-class known p/s issues? not sure what your talking about. No one is going to care about the tires being a hair wider. Have no worries.

No one "should" care, I agree. Whether a dealer would try to make an issue of it is another matter. However, I agree that its very unlikely the dealer or anyone will care.