Sunday's Spanish Grand Prix turned into a horror show for Mercedes and team principal Brawn as drivers Nico Rosberg and Lewis Hamilton went backwards through the field.
After underlining their superiority in qualifying with a front row lock-out for a third successive pole position, Rosberg could only finish sixth, whilst Hamilton dropped out of the points to 12th.
Pirelli's tyres played a crucial factor, and whilst the Italian manufacturer has announced changes from the Canadian GP onwards, Mercedes know they still have to get on top of their race day woes.
"Our work continues at Brackley (factory base) and Brixworth (engine base) to fully understand the reasons for our below-par race performance in Barcelona," said Brawn.
"This is in order to develop the right solutions for the upcoming circuits where high tyre usage could again be a limitation for us."
Theoretically, next weekend's Monaco GP should not pose such issues because if Mercedes can again lead away the field, they should be in a position to control the race from that position.
Brawn, however, feels tyres will be a factor, adding: "The priority is always to get the drivers comfortable with the unique challenge the circuit presents and to give them a set-up they feel confident pushing to the limit.
"Both Nico and Lewis have historically been incredibly competitive in Monaco, and next weekend will certainly allow their talent to shine.
"The engineering team will be focused on getting the most from our car on the slow, bumpy layout, and there will of course be particular emphasis on achieving tyre consistency and durability."
Rosberg, on pole at the last two races, knows what is at stake if he can make it three in a row.
"At the moment we have a good car for qualifying which helps in Monaco as it's the most important qualifying session of the year as track position is so important," said Rosberg.
"So that might be helpful for us, but there are so many unknowns, especially with the tyres, so we will just have to wait and see.
"But I have good memories from the race last year after finishing in second place and I hope we can get another good result this time around."
Hamilton, who has spent the last few days in Orlando since the race in Spain at an event for one of Mercedes' key sponsors, can only hope improvements have been made for Monaco onwards.
Hamilton said: "Perhaps more than at many other tracks, qualifying and getting the best possible track position is crucial in Monaco.
"But we have to keep our focus on Sunday as well and keep working to improve our race pace.
"Everyone is working really hard and I know we can get there. We just need to keep motivated and work it out together."