According to autokult.pl, the incident took place on the Polish A4 highway this Sunday. Firefighters arrived soon on the scene but the car burned furiously.
The blaze destroyed the whole engine bay and interior, even burning through roof pillars. But strangely, the tires did not explode, despite the intense fire. The owner reported fire originating in the engine bay and quickly spreading to the interior.
Thanks to Rafal for the tip!