Mercedes head of Motorsport Toto Wolff says that people will be surprised when the new Formula 1 season gets underway in Australia next weekend.
Prior to pre-season testing, concerns were expressed in some quarters that the sport would lose its allure due to the introduction of 1.6 litre power units.
But Wolff insists that people will be pleasantly surprised by the new regulations.
"The new regulations have been a massive challenge for everybody involved, and the team has been pushing flat out to get the car to where it is now as we approach the first race in Melbourne," said Wolff.
"While it is true that the quickest car with the quickest drivers will win, reliability will be a key factor. We want to bring both cars to the flag in the best possible position. We now face the ultimate reality check in the first race of this new era for Formula 1.
Wolff revealed that while Mercedes's W05 is not yet the finished article, the team is cautiously optimistic ahead of the opening round of 2014.
"The feeling within the team is not one of nerves, however. It is more a sense of relief to finally be unleashing our cars in race conditions," he said.
"Everybody now just wants to get out there and see where we stand. Expectations are high, both internally and externally. Although we're not quite where we want to be right now in terms of a complete package, I'm optimistic in that we've done everything possible to prepare for the challenges ahead.
"I think people are going to be pleasantly surprised by the new cars: the noise, the speeds and ultimately the lap times. This is cutting-edge technology - and that's exactly what Formula 1 stands for."