Intro:

Mercedes driver Nico Rosberg reflects on his disappointing Singapore Grand Prix -- where he was forced to retire after an electrical problem -- in his latest video blog.

Script:

SOUNDBITE: (English), Nico Rosberg:

"Toughest day of the year for me that one. Just felt so helpless also, nothing was working at the beginning of the race -- I didn't have fourth gear, sixth gear, the upshift paddle was double shifting every time, no DRS, no hybrid power, nothing, the whole steering wheel wasn't working. It was just a tough one but that's the way it is, but just reliability for the team, that's what we need to work on. That's the weakness -- they are flat out to try and improve somehow. But yep, very disappointed but OK need to try and get over it and move forward."