i was very happy with the service from Derby last week for the CLK's 4 year service & MOT. until today, just noticed the state of the roof on the passenger side. it's the first time it's rained since i had it back & the roof being damp clearly shows that a jet wash has been used very, very close to the roof. the passenger side is grubbier as it sits near a tree on the drive & you can clearly see 'stripes' where the jet wash has been used! if a jet wash has been used this close up on the roof, surely it will have removed some of the protection won't it? i've never let a jet wash near the roof, as recommended in the handbook.