The alloy wheels on my Mercedes C-Class (2010) were replaced after showing signs of blistering and discolour. However, the dealer who carried out the work under the warranty is now demanding £367 towards the cost, as the warranty has actually expired.

As a goodwill gesture, the dealer is offering to pay 75 per cent of the bill, but they want me to pay the remainder. I have refused until I seek further advice as none of this was ever mentioned prior to the work being carried out.