Mercedes boss Toto Wolff says his team needs to be "flawless" if it is going to beat Red Bull at the Hungarian Grand Prix this weekend.
After winning five races in a row and taking pole position by over a second at the last three rounds, Mercedes is in dominant form at the moment. However, the world champions have not won a race at the Hungaroring since the introduction of the current V6 turbo regulations in 2014 and Wolff believes the track, which requires a high-downforce set-up, will suit rivals Red Bull.
"We face a very different challenge in Budapest," he said. "This circuit has not been kind to us over the past two years and it plays to the strengths of our rivals.
"The Red Bull, for example, is a car that functions well where high drag isn't penalised as much as at other types of circuit. So, in wet conditions and at low-speed circuits such as the Hungaroring, they are a major threat.
"We will need to be flawless to come out on top at this track."
Mercedes' executive director (technical) Paddy Lowe is expecting a tough weekend for the cars and drivers in Hungary.
"It's the only race we haven't won in the V6 Hybrid Formula One era and the Hungaroring is a tough venue to crack, with only 13 of the 30 Grands Prix to be held at this circuit having been won by the pole sitter -- despite it being one of the toughest tracks on the calendar for overtaking. It's tough on both cars and drivers, with ambient temperatures often reaching well into the 30s Celsius.
"The layout is low-speed, so we will run as much downforce as possible -- similar to Monaco. With the SuperSoft compound available -- a tyre one step softer than the softest compound allocated last year - we expect to see some very quick qualifying times."