Mercedes boss Toto Wolff comes away from the Hockenheim DTM finale dissatisfied with the team's C-Coupe performance but has vowed a stronger 2015 is on the agenda.

Paul di Resta and Robert Wickens finished fourth and eighth today [Sunday] at the Hockenheimring but Wolff had hoped for more from the Mercedes C-Coupe outfit at the DTM finale.

Mercedes introduced a new aero package to its C-Coupe challenger this weekend but the upgrades did little in lifting the ultra-successful DTM squad's fortunes ahead of 2015.

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Wolff had commented yesterday after qualifying that the improvements made to the C-Coupe would need time to flourish, given the little practice running available on race weekends.

Mercedes' 2014 challenge began firmly in the mire when no 'three-pointed star' driver managed to score any points at the season opener.

Since then Mercedes' prospects have improved after taking three-victories this season but Wolff, understandably, still looks back on the year with mixed feelings.

"I'm not all that pleased with our result," said Wolff. "It was a small step in the right direction but not yet quite enough. Still, we can build on today's performance."

"We have mixed feelings as we look back over the season. We'll now have to get to grips more with our car over the winter, and preparations for the new season will begin tomorrow. We intend to attack again from the front next season."