Vehicle care 187Clean smearing wiper blades witha soft cloth and window cleaner.MoonroofNever clean with solvents or abrasiveagents, fuels, aggressive media (e.g.paint cleaner, acetone-containingsolutions etc.), acidic or highlyalkaline media or abrasive pads. Donot apply wax or polishing agents tothe middle part of the moonroof.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 bya workshop.Before and after winter, wash theunderbody and have the protectivewax coating checked.Engine compartmentAreas of the engine compartment thatare painted in the same colour as thevehicle must be looked after like anyother painted surface.It is advisable to wash the enginecompartment before and after winterand preserve it with wax. Protect thealternator and brake fluid reservoirwith plastic sheets before washingthe engine.When washing the engine witha steam-jet cleaner, do not direct thesteam jet towards components of theantilock brake system, airconditioning system or the belt driveand its components.After an engine wash, have all engineroom components preservedthoroughly by a workshop usingprotective wax.Do not use high-pressure jetcleaners.Towing equipmentDo not clean the coupling ball bar witha steam-jet or high-pressure jetcleaner.Interior careInterior and upholsteryOnly clean the vehicle interior,including the instrument panel fasciaand panelling, with a dry cloth orinterior cleaner.The instrument panel should only becleaned using a soft damp cloth.