We purchased our 2017 XC 60 during the King of Sweden sale Feb 2017. This enhancement "includes complementary 4 year / 50000 miles FSM including wear item coverage (excludes tires) at no extra cost to consumer or retailer. (Not for leased vehicles). I will be going in soon for my fourth year visit. I am sure it includes an oil change and was wondering what wear items I should ask about? The only thing I have noticed is the drivers side wiper is not clearing well. Any comments will be appreciated.