Chrome parts
In order to prevent spots and corrosion of chrome parts, wash with water, dry thoroughly, and apply a special protective coating. This should be done more frequently in winter.
See also:
Cleaning the outside of your vehicle
If the following is left on your vehicle, it may cause corrosion, discolouration
and stains, wash the vehicle as soon as possible.
Seawater, anti-freeze for road use.
Soot and dust, iron powde ...
Radio control panel and display
1- PWR (On-Off) switch
2- AM/FM (FM/MW/LW selection) button
3- Memory select buttons
4- TUNE switch
5- SEEK (Up-seek) button
6- SEEK (Down-seek) button
7- FM (FM1/FM2/FM3) indicator
8- ST ( ...