Yes, with the Tyre tets that Mercedes did.
Have to like Horners commeent "It didn' hurt them too much, as they are on the front row" or words to that effect.
Shame I must have missed the silver car on pole position for the 3 races before the tyre test.
I can understand why Pierelli might want to use the Merceds to test the tyres as they are one of the teams hardest on the tyres. So if they hold up well with a car that chews tyres they should work well on cars who are lighter on the tyres.