The judge in the German town of Wiesloch said the manufacturer should have catered for Michael Herzog's size 12 feet.
He went to court complaining the area around the accelerator of his new Volvo C70 coupe was too small to accommodate his feet.
The court ruled his feet were not abnormally large and the judge said the dealer should give the German five per cent off the price of his new car.
It is not known whether Herzog was offered a test drive in the C70 before purchase.
Herzog obtained a £1,350 refund to pay for a specially made pair of shoes that allowed him to squeeze his foot into the space.
He was also compensated for the time spent changing back into street shoes each time he got out of the car to meet clients.