Audi's Mattias Ekstrom goes into the lead of the DTM championship after securing his first ever victory around the Red Bull Ring as Pascal Wehrlein fails to finish.

The Abt driver saw off a late race charge from ART Grand Prix's Gary Paffett to convert his earlier pole-position in a 21st career DTM triumph - taking what could be a crucial leap towards a third title.

The race - which, due to the adverse conditions had already been delayed - began under the safety car thanks to the colossal amount of water and spray that engulfed the circuit.

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Amazingly, the field spent only five-laps under safety car control before being released into full race combat.

As expected, Ekstrom pressed home his advantage of being at the front and used the clear visibility to quickly assemble a four-second gap back to Team Phoenix's Mike Rockenfeller.

However, it soon became apparent that it was the Mercedes C63 of Paffett who stood as Ekstrom's real danger. The Briton - sensing time was of the essence - made a bold move around the outside of Rockenfeller at turn four and subsequently set about reducing the margin to the race leader.

The 2005 DTM champion gradually chipped away at the gap but a slow 5.1 second pit-stop scuppered his progress. Crucially Paffett rejoined ahead of Edoardo Mortara in third to keep his chances alive.

The gap between Ekstrom and Paffett continue to seesaw as the pair slugged it out from sector to sector but with ten-laps to go the Mercedes made real inroads and narrowed the Abt Audi's lead down to 2.7 seconds.

It was a futile effort as Ekstrom managed to respond when he needed to and stabilised the gap to a winning margin of 4.4 seconds.

Mortara held on for third ahead of a rejuvenated Rockenfeller while Nico Muller posted his best result of the season in fifth, ahead of the controversy which kicked off behind.

Team Phoenix's Timo Scheider crossed the line in sixth but the Audi driver - along with Wehrlein and Robert Wickens - have been summoned by the race directors following their three-way final lap tangle.

The trio were battling for sixth place with Wehrlein leading the group into turn three. But contact from Scheider into Wickens sent both of the Mercedes C63's careering into the gravel and out of the race.

That meant DTM newcomers Lucas Auer and Maximillian Gotz both scored their best finishes in the series with seventh and eighth ahead of fellow Mercedes team mates Christian Vietoris and Paul di Resta in ninth and tenth.

Di Resta survived a number of off track excursions on his way to finishing tenth.

Further back in the pack, not one BMW managed to score a point in race two with Team Schnizter's Antonio Felix da Costa missing out on a point by four-seconds in eleventh.