Pull over and wait out the storm. Reported damage to vehicles includes pitting, arcing, burning on both exterior and interior places. See the below photographs, courtesy of Mr. Brown, of his Jeep Cherokee which was struck by lightning. Cases have been reported of total destruction of vehicle wiring, and associated electrical and electronic systems. Cases from police departments report bad burns to the hands and mouth where officers were using radio microphones when their vehicles were struck.
Cases describe total blow-out of all four tires in passenger cars.
A video in our NLSI library shows a station wagon being struck by lightning in a heavy rain storm, with no damage whatsoever occurring.