Kubica: Car simply not good enough

Kubica and team-mate Nick Heidfeld endured their worst qualifying performance for the German squad, both going out in the first qualifying segment in Monaco.

Kubica, yet to score a point, will start the race from 18th position, one place behind Heidfeld.

BMW was hoping to fight for the title this season, but instead has found itself struggling to score points.

After Monte Carlo's dismal showing, Kubica said the team must adapt to the new situation to get out of it.

"So far we have only had difficulties," said Kubica. "We struggled on Thursday and again this morning. I had a very bad out lap with a lot of traffic. As a result my tyres cooled down a lot.

"However, the overall performance of the car is not good enough. We have to realise we are bad. We have to adapt to the situation and we have to work very hard now."

Heidfeld admitted their performance was "way behind expectations".

"Obviously this is extremely disappointing," said Heidfeld. "We made a lot of changes after Thursday's free practice and even more changes after this morning's session, although this is always a bit risky shortly before qualifying. But we knew we hadn't much to lose.

"Actually it was rather a change for the worse than for the better, but it didn't really make a big difference anyway. It is frustrating when you go to the absolute limit and take every risk, especially here on this special circuit, and you still end up nowhere. Currently we don't know what's wrong.

"In Barcelona we made a step forward, but here we are way behind expectations."