Day 13, guys, let's hope it won't be an unlucky one haha! Last time the winner was, again, 
We're halfway through this contest and you all have to do something if you want to stop this guy from winning!
Today's letter is
M.
What's your first thought when you think of that? Mine is M-power.
Anyway...
Let the guessing begin!
I will reveal the photo source after the correct guess!
Hint 1: One of Jeremy Clarkson's 'favorite' cars.
Hint 2: British made.