What is this and what does it do

[Knight Rider S4]

Have been sorting out the brake warning light on dash today so when i had it out noticed this ...what does it do ?........

[Skull]

right switch engine setting for bord computer, left 3 switches fuel consumption correction from -15% to +15%

[pixsaudisex2]

there is some switches on the clocks that turn them into german ones etc quite amusing when we did it to one of my mates cars he thought he had brought a special edition car.. ( actually says light bulb etc ini german instead of the bulb picture..

[Knight Rider S4]

yeah was playing about with it tonite lol .......german and english text for Auto check