BMW's Marco Wittmann is 'well prepared' for battle as the 2014 DTM champion kicks off his title defence at Hockenheim this weekend.

Wittmann's relentless charge to his maiden DTM championship success last season was nothing short of exceptional but the RMG-driver heads into a year full of unknowns amid a plethora of rule changes designed to create even more on track action.

This time last year, Wittmann took the then brand new BMW M4 to a first ever DTM victory at the Hockenheimring and after following a 'positive' winter of testing and development, the 25-year old is confident of repeating his 2014 success at the season opener.

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"There is obviously a lot of anticipation ahead of Hockenheim, as it has been a long winter break. On the whole, the tests have been positive and I think we have had a good preparation," said Wittmann.

"We obviously now want to convert this into good results on the opening race weekend. Despite this, you can never be 100 per cent sure how you compare to the opposition until the first race.

"The season-opener will definitely be a spectacle for the fans. And it goes without saying that I would love to follow on from last season's success in Hockenheim, given the opportunity."

Despite BMW's resounding success since returning to the DTM back in 2012, BMW Motorsport boss Jens Marquardt isn't underestimating the threat Mercedes and Audi will pose over the revamped 18-race championship.

"We have worked very hard over the past few months to make our overall package of drivers, teams and the BMW M4 DTM even stronger for 2015," said the BMW Motorsport director.

"That is absolutely essential, as you can never afford to rest on your laurels in this fiercely-competitive series. We have won six of nine possible titles since our comeback in 2012. The goal is to add to our successful record this season.

"We have no fewer than 18 opportunities to do just that in 2015. It will be exciting for everyone involved - including the fans, of course - to see how the DTM weekend in Hockenheim pans out. The new two-race format promises even more action. Our drivers and teams can hardly wait for the first showdown on this iconic circuit."