Local news regarding this type of attack would weigh heavily on my actions. I'm betting this type of ambush is common and likely heavily reported. If previous attacks have resulted in no shots fired for a compliant victim, then I am likely forking over the cash or vehicle. Mexico is notorious for this, so traveling with cash is critical for some professions and locals there. You are more likely to suffer violence if you do not have the ability to "pay for your life". Most of the time it is a shakedown for cash with violence unlikely. If the local track record is more violent, then I am using the vehicle as a weapon, getting below the dash, getting into other traffic by any means necessary. If they are able to pin me down, I am firing on anyone that approaches my door or presents a target. All this assumes I am alone in my car. If my family is with me, I am likely complying and hoping for the best. If I lived in an area where this is common, I would drive a large powerful truck with a grill guard to ram cars out of the way. That Passat would be a speed bump for my lifted tundra.