Vehicle care 189Windows and windscreen wiperbladesUse a soft lint-free cloth or chamoisleather together with window cleanerand insect remover.When cleaning the rear window,make sure the heating element insideis not damaged.For mechanical removal of ice, use asharp-edged ice scraper. Press thescraper firmly against the glass sothat no dirt can get under it andscratch the glass.Clean smearing wiper blades with asoft cloth and window cleaner.SunroofNever clean with solvents or abrasiveagents, fuels, aggressive media(e.g. paint cleaner, acetone-containing solutions etc.), acidic orhighly alkaline media or abrasivepads. Do not apply wax or polishingagents to the sunroof.Wheels and tyresDo not use high-pressure jetcleaners.Clean rims with a pH-neutral wheelcleaner.Rims are painted and can be treatedwith the same agents as the body.Paintwork damageRectify minor paintwork damage witha touch-up pen before rust forms.Have more extensive damage or rustareas repaired by a workshop.UnderbodySome areas of the vehicle underbodyhave a PVC undercoating while othercritical areas have a durableprotective wax coating.After the underbody is washed, checkthe underbody and have it waxed ifnecessary.Bitumen/rubber materials coulddamage the PVC coating. Haveunderbody work carried out by aworkshop.Before and after winter, wash theunderbody and have the protectivewax coating checked.Towing equipmentDo not clean the coupling ball bar witha steam-jet or high-pressure jetcleaner.Rear carrier systemClean the rear carrier system with asteam-jet or high-pressure jet cleanerat least once a year.Operate the rear carrier system oncein a while if not in regular use, inparticular during winter.Interior careInterior and upholsteryOnly clean the vehicle interior,including the instrument panel fasciaand panelling, with a dry cloth orinterior cleaner.Clean the leather upholstery withclear water and a soft cloth. In case ofheavy soiling, use leather care.The instrument cluster and thedisplays should only be cleaned usinga soft damp cloth.