Could you please elaborate?
First I thought it was a rechargeable ability and expect to see a button on vehicle menu but there wasnt...
at ready for supply section it asked me to take this ability which I didnt expect to see as well but I took whatever I can (max is 5 I think) and description was something like that rifleman and engineers boost acc. of nearby vehicles so my new expectation was to see button on inf menu but still there wasnt a button like that and neither there wasnt a ability button too...
-wickY26