Mercedes team boss Toto Wolff has dismissed suggestions that his Formula 1 team is running a trick device that increases its straightline speed.

Mercedes’ straightline speed performance has caught the eye of its rivals in recent races, as it enters the final six races in a title battle with Red Bull.

At the recent Turkish Grand Prix Mercedes looked to have a significant advantage in top speed compared to Red Bull, despite running higher downforce levels.

The Brackley-based outfit introduced a fresh engine specification after the summer break, which has left Red Bull searching for answers as to how it has gained performance from its power unit.

Red Bull team principal Christian Horner believed Mercedes was not only ahead of its Honda power unit on power alone, suggesting its recent boost in straightline speed was being aided by a trick device that lowered the rear of the car on the straights.

Speaking to Sky Sports F1 during FP1 at the US Grand Prix, Horner said: “I think that Mercedes are obviously optimising a straightline device that they’re able to do at that type of circuit.

“If you look at the rear of their car, you know, how it lowers. I think [Turkey] played to their strengths.”

When Horner’s comments were put to Wolff, the Mercedes chief brushed off speculation over the team’s present form.

“I think we recognise absolutely that this is a sport where competitors will always try to find out if there is some kind of silver bullet,” Wolff said, as quoted by Motorsport.com. “My experience is there is no such thing, it’s all the small gains, marginal gains that have been added and bring performance.

“We’re trying to really comprehend our car better and add performance in lap time without listening too much to the nois​e.”

Asked to explain why Mercedes looked dominant in Turkey, Wolff insisted it had managed to find a “sweet spot” when it comes to setting up the car.

“I think what we have been able to understand is how to hit the sweet spot of the car, in terms of the set-up,” Wolff explained.

“Today when you look at the lap time, it’s a straightline gain, and I think we found the right compromise between drag and downforce.

“And on the other side, we were very quick through the very fast corners, which is good and equal to Red Bull on the slow corners. So overall, the car is much better together.”