I do not see what on that car McLaren would want? Why would McLaren want to take tips from the BGP001? Last years McLaren ended the season faster than the Brawn, and this years McLaren ended up quicker also.
I SUSPECT that it was more of a Mercedes Decision not to let that car go! Maybe Haug promised the cars to his Grandkids or something! Either way for Jenson to threaten them with high court leads me to believe they wasnt letting that car go without a fight.
Lets not forget, Ferrari give Schumcher the last Ferrari he raced for them!!! Whos to say Haug and co havent sniffed around that! Not that they would want to as its almost 4 years old now