Finally I got round to photograph this somewhat old sign:
Translation: Customer parking 60m left
Looks stupid at first, but actually makes sense: those customers arriving from one direction see this sign next to the main entrance, continue to drive 60m in the direction of the arrow, then turn left to the parking site; those arriving from the other direction have already seen the parking site anyway.
(Telekom headquarters Heilbronn, 12/2007)