Toto Wolff knows Mercedes have "zero room for error" with Ferrari "breathing down our necks" despite such an encouraging start to the Formula One season.
Mercedes have maintained their dominance of the sport at the start of this year, with Nico Rosberg winning both races and world champion Lewis Hamilton second and third in Australia and Bahrain respectively.
Ferrari already trail Mercedes by 50 points in the constructors' standings, with the latter having been crowned champions in each of the last two years.
Mercedes will aim to maintain their momentum in the Chinese Grand Prix this weekend, but head of motorsport Wolff said there is no danger they will rest on their laurels.
"After two races, we find ourselves in a strong position. Our car has proven itself to be competitive in a range of conditions once again - but also reliable even at this early stage, which is a tremendous achievement." said Wolff.
"But there is a long way to go and we have by no means been flawless in every area so far. With Ferrari increasingly breathing down our necks, as we saw in Bahrain, there is zero room for error.
"Remaining energised is now more important than ever - and we all have plenty to keep us on our toes in that respect. With just two races down and nineteen to go, I wouldn't say there is momentum on one side or the other.
"But what is clear - and very exciting for the team and the sport - is that we have two drivers high in confidence who will provide us with plenty of entertainment over the coming months."