Hi thanks for the response they are saying it is tyre skipping and they will not pay free of charge. I completely agree with you reading about this every dealership is different unfortunately my one is saying no way I have escalated to the finance companyIf the issue is related to 'tyre skipping' as JBD suggests then I believe MB were offering replacement Winter Tyres or they were at least for GLC Owners, unsure if this is also the case for C Class or E Class owners, it should be. Plenty of information on the forum in relation to that specific issue. If it is not related to this then it is unlikely that the tyres will be replaced under warranty they are class as a friction or consumable item. I believe how the MB Warranty Claim system works is that the dealer sends off a claim request to Germany and it is either approved or rejected. If rejected then the part/s are not provided to the dealer FOC. If it has been going on for as long as the OP says it is likely that the dealer sent the request off and it was rejected. This happened to me on my old A Class, MB Germany wouldn't stump up for a faulty seatbelt despite the car only have 3k on the clock. My Dealer however agreed with me and took the hit on the seatbelt, I really do believe it is down to how the individual dealers handle these situations as they can be tricky for both parties, especially when MB Germany won't play ball. If there are no mechanical defects on the vehicle and the issue with the tyres are not deemed to be related to the skipping (there is a Mercedes Technical Bulletin regarding this issue) then they probably won't replace them as per the terms and conditions of the warranty.