Finally, the big day dawned – the part of the event that would let the teams leave their mark on the asphalt. The morning was largely devoted to testing the dynamic discipline of acceleration (a process that involved accelerating from a standstill over a 75 m stretch). The teams excitedly eyed up the competition and compared their times closely, some achieving remarkable results. They then completed full circuits of the track. These tests were in some cases run against the clock and, later, over circuits of different lengths, allowing the teams to assess their car's performance in different setups. The day was punctuated by a soundtrack of roaring combustion engines, squealing tyres and the hum of electric motors. The drivers in particular worked flat out, and were exhausted by the time the event drew to a close. "The karting track gave us new insights, particularly when it came to driver training", said Uwe Heidel from the WHZ Racing Team.