Early Friday morning, Martin Ragginger and Robert Renauer (Tonino powered by Herberth Motorsport, Porsche 911) opened the ADAC GT Masters 2013 season in the etropolis Motorsport Arena Oschersleben with a best time in the Porsche 911. Under a cloudless sky and air temperature of 18 degrees, the two Porsche drivers set a best time of 01:27.807 minutes and were 0.410 seconds faster than defending champion Maximilian Götz and co-driver Maximilian Buhk in the Mercedes-Benz SLS AMG GT3 (Polarweiss Racing).

Corvette drivers Andreas Wirth/Christian Hohenadel (Callaway Competition) were third fastest from Christian Mamerow/Christer Jöns in the Audi R8 LMS ultra (Prosperia C. Abt Racing) and the Corvette of 2012 runners-up, Diego Alessi and Daniel Keilwitz (Callaway Competition).

The two Dutch drivers, Jeroen den Boer/Simon Knap (DB Motorsport) produced the sixth fastest lap in the fastest of the BMW Z4 GT3s ahead of the new Ford GT with Nico Verdonck/Frank Kechele (Lambda Performance).

Christian Engelhart/Nicolas Armindo in the 911 GT3 R (Team Geyer & Weinig IT Consultancy), Andreas Simonsen/Sergey Afanasiev in the Mercedes-Benz SLS AMG GT3 (Polarweiss Racing) and defending champion Sebastian Asch & Florian Stoll in the Audi R8 LMS Ultra (MS RACING) completed the Top Ten in first practice.