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Sebastian Vettel believes Formula 1 should be focused on being a sporting contest rather than too technology-driven.

F1's rules are set for an overhaul next year with faster, wider cars and bigger tyres while the engines have become influential following the introduction of the hybrids for 2014.

"I believe that primarily it should be about sport and accordingly which driver is fastest," said Vettel on his official website.

"The car currently plays a significant role, as it did in the past. However, we should not lose ourselves in complicated rules."

Vettel believes the dominance of Mercedes has proved a turn-off for fans, but he reckons the way the rules are written also has an effect.

"The domination of Mercedes during the past two years has naturally reduced the excitement for many fans," he said.

"In addition, the current regulations are too detail-orientated.

"I believe we should not lose sight of the motorsport's roots and that in future we are able to once again identify with the cars."

Vettel left Red Bull for Ferrari at the end of 2014 and was the only non-Mercedes driver to win a race in 2015, the German triumphing three times.

When asked if could end his career at Ferrari, Vettel said: "Could be.

"However as a person I am not the type of person to constantly switch from one team to another every year.

"I am not that and never have been, in no walk of life.

"At the moment I feel very content and we have targets that we aim to achieve together."

Translation by Dieter Rencken