hi to everyone.
i own a 2010 ML320CDI . i got it with the stock 19" rims and tyres. due to the awful road conditons my local MB dealer suggested that 17" tall tyre will be better as far as driing comfort goes. i am currently driving with my winter tyres 235/65/17 and it is time to switch to summer tyres.
i am being offered 265/60 R17 tyres.

so, i now have 235/65/17 - winter
i intend to put 265/60 R17 - summer tyres
will these difference 235 - 265 have any impact on the ride quality. any other problems that might occur due to this difference in size.

Thanks in Advance!