Paris - Mercedes became the third Formula 1 team to try out manufacturer Pirelli's wider 2017 tyres on Tuesday.
Wider tires will feature on all cars next season as part of changes designed to make cars quicker and to increase overtaking.
Red Bull and Ferrari previously tested 2017's tyres, which are about 25% wider.
New tyres
German driver Pascal Wehrlein, who races for the F1 Manor team but is also a junior driver for Mercedes, tested the tyres at the Paul Ricard circuit in southern France.
He drove a 2015 Mercedes F1 car modified to simulate 2017 levels of downforce.
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Ferrari did further work with Pirelli on Tuesday (September 6) on the Spanish GP track just outside of Barcelona, with Kimi Raikkonen driving.
Team mate Sebastian Vettel recently did wet-weather tire testing.
Pirelli tyre test at Le Castellet.
— Pascal Wehrlein (@PWehrlein) September 6, 2016
#PW94
Foto: Wolfgang Wilhelm pic.twitter.com/XswwQOOfsP
REVEALED! The eight-wheeled, #F1 W08 Hybrid! ????????
— MERCEDES AMG F1 (@MercedesAMGF1) September 6, 2016
?? Wolfgang Wilhelm pic.twitter.com/0RZaRWx1kn