- Went into the church, got the mission start - Put the C4 onto the fuel-truck - went in time onto that watertower and waited for the convoy to be ambushed
- came down from the water tower and elminiated almost every of the pirate soldiers down there.
...and now it gets tricky.
During eliminations of the last couple of soldiers I stood behind the tank truck and spottet the "Hold E - interact" message. I pressed the "E" button until it came out on the bottom of the keyboard - nothing happened. Then the truck started driving away ("I'll follow him on foot"- WTF?!). Approximately 2-3 meters behind the firewall from the fuel truck I lost the tank truck every frakkin' time (= MISSION FAILED!). The mission restarts: with me again on the water-tower and (almost half a mile away) the tank truck already underway!!!
After reading about the specific mission in a walkthrough, I finally got past this part.
There is another truck parked in a back road right beside the road with convoy on. You'll have to board this truck and drive after the convoy truck - I just didn't see that one and the "I'll follow him on foot" commentary from the main character fooled me completely...
YOU have to get in the truck and follow/ chase the other truck with the prisoners in it, when you get to the back of the apc and open the door, vaas is in it, hope that might help. I'm stuck at another mission where you have to shoot a big smoking devil thing that comes out over a temple only with a bow, in 'meet citra', anyone have any clues!