A Czech millionaire appearing to do 417km/h (260 mph) is under police investigation for speeding.
Radim Passer is now being investigated for his apparent drive along a motorway in the state of Saxony-Anhalt.
The prosecutor’s office in Stendal said it had launched a probe into the potentially illegal incident.
The driver faces a prison sentence of up to two years or a fine, reports say.
The wealthy sports car owner from the Czech Republic posted videos of last summer’s apparent drive in a Bugatti Chiron on the A2 between Berlin and Hanover on YouTube, bringing attention to the incident.
In the videos, the car’s speedometer appears to display a speed of up to 417km/h.
In written comments beneath the video, Mr Passer says: “There was visibility along the whole stretch. Safety was a priority, so the circumstances had to be safe to go.” He adds that the drive took place at 04:50 on a Sunday morning and there had been an earlier drive-through of the stretch of motorway.
Police launched an investigation after the alleged breach was reported in German media.
