back and forth
backwards and forwards, first one way and then the other way
The argument went back and forth before the judge made a decision.
The Best Bulletproof Cars
MercedesBenz S600 Guard engine and performance
The engine bay is obviously protected, too, so you dont loose motive force if you need to get away.
Providing the propulsion for you to flee is Mercedes 530hp twinturbo V12. The standard S600 L sprints from 062mph in 4.6 seconds, but we reckon the added weight of all that armour will slightly dull the performance. The blastrepelling mass means top speed is limited to 130mph.