123Movies. Up to 4,000 car washes and around 1,000 interior washes per day; plus a hand wax station, 48 vacuum cleaner spaces, a petrol station and an oil change service: the world's largest car wash in Stuttgart-Feuerbach (Germany) is a superlative system. The documentary takes a look behind the scenes of the family business and shows the enormous logistical effort involved in handling the vehicle masses and the perfect luxury car care.