I think Pirelli themselves, I mean, Paul Hembery himself, seems like he really want to know what had happened in Mercedes car in Bahrain and Spain. He gutted to know what's going on with his tyres on that Mercedes car, and I think that's the reason why at the final Pirelli tends to choose the Mercedes team, and of course.. using the 2013 cars for solving the problems...
"problems" I mentioned is... I don't know, could Pirelli's but most likely is Mercedes. Or probably Pirelli just want to make sure that their tyres is not malfunctioned, it was just a matter of correct setup on the tyres? So they just need to give information to tweak on Mercedes car so that it can perform correctly.
Is this legal? Of course not.. It's just a fantasy of my mind what might had happened. Pirelli themselves really struggling on critics in media. especially on how bad that Mercedes perform. It will dominate the headlines on every news, the T words continues...
To stop this, they (I think) willingly to give a help to Mercedes... but of course, quietly...
With some trade of money, and some old pal of Brawn and Bernie himself seems liking the situation helping Mercedes, then the test continues...
After thinking all the scenario on what might happen next, I think... Mercedes would be punished badly. What might be happening is RB and Ferrari could do the same test just like Mercedes did. Mercedes will be fine, Ferrari and RB will be too... thus, all teams don't need to quit F1, especially these big teams.
Please remember that F1 is a circus! what a circus we watch if no players around it? So all big teams will be fine....
I wonder how about Lotus situation? They should have been mentioned as big teams as well... looking on how they perform this year and last year, they should have been growing more. But their money seems like running out. If Lotus broke, then Mercedes should be maintained whatever the consequences F1 must have (like forgiving this "secret" test), even more critics from RB and Ferrari will be stroke. But finally all will be fine. all is well