Opting for satnav on either the Audi A4 SE, S-line, S4 and even muscular RS4 before this October will cost only a quarter of what Audi normally charge.

Slashing the cost from £1970 to just £500, models must be registered on or before 30 September to be eligible for the discounted rate.

Cut-price satnav is not the only incentive tempting buyers to plump for BusinessCar Awards winning Audi’s A4s. Higher SE specification is available at no extra cost over the S model, while opting for the sporty S-line trim that sizes up the 17-inch alloys to 18s while adding sport suspension and styling kit for a discounted £750.

Prices start at £19,915.