Syal Brother,

I work for an Insurance Company and I can tell you that you have no liability whatsoever while you are dirving for your company. As people have mentioned, your company should have had physical damage (collision and comprehensive) coverage for the vehicles they own. Your company would have been liable even if you are driving your own car for work. Companies usually buy "non-owned auto" insurance if they  make their employees drive their own cars. 

So, you are off the hook.