Chevrolet Cruze pole sitter Muller beat British team-mate Tom Chilton to the chequered flag as his team locked out the first four spots.
It was Muller’s fifth victory of the season and further extends his lead in the drivers’ championship.
After qualifying on pole position, Muller took a lights-to-flag win ahead of Chilton, with Michel Nykjaer finishing third and Pepe Oriola fourth.
After Tiago Montiero pulled up with turbocharger failure in Free Practice yesterday, Gabriele Tarquini suffered the same fate in the other Castrol Team Honda car on lap seven.
As some comfort for the team, Monteiro - competing in front of a large home crowd - rewarded the fans by recovering from 17th to ninth.
Besides Tarquini, several other drivers failed to finish the race. Norbert Michelisz made contact with the wall on the second lap and pulled up, while a bizarre incident on lap 9 saw the BMW of Franz Engstler make contact with the rear of a marshal’s pickup truck that was on its way to recover Tarquini’s car.
Fredy Barth then spun while trying to avoid Engstler’s car and the pickup, which brought out the safery car for two laps.
FOUR DRIVERS PENALISED AFTER RACE 1
A few drivers received penalties from the Stewards after today’s first race.
Hugo Valente received a 30-second time penalty plus a 10-position grid penalty that will be applied at the next race for ignoring yellow flags and causing and incident.
Mikhail Kozlovskiy and René Münnich were punished for speeding at the rolling start. The Russian received a 30-second time penalty, the German (who was not classified) a 10-position grid penalty that remains suspended for three events.
Tom Boardman was given a 30-second time penalty plus a 10-position grid penalty that remains suspended for three events for causing the incident with Mehdi Bennani.
1. Yvan MULLER FRA Chevrolet Cruze 27:38.637
2. Tom CHILTON GBR Chevrolet Cruze 27:38.980
3. Michel NYKJAER DNK Chevrolet Cruze 27:39.302
4. Pepe ORIOLA ESP Chevrolet Cruze 27:39.955
5. Robert HUFF GBR SEAT Leon WTCC 27:41.130
- Sports & Recreation
- Motor Racing
- Tom Chilton
- Chevrolet Cruze
- Gabriele Tarquini
- Michel Nykjaer
- Pepe Oriola