[MikeK]

That depends on several factors:

1) Your confidence in the condition of the mechanical and electrical systems of the car. How big of a tool box do you tote around with your modern car? Henry put a tool bag and owner's manual in every new A. That should be sufficient if everything is in excellent condition.

2) Your mechanical, electrical, and diagnostic skill level. Pulling a trailer load of tools won't help if you have little practical experience in using them. If the engine quits do you know what to look for and where/how?

Seriously, if you are just starting with A's your best tool kit includes a AAA or insurance card with roadside assist and towing.