● Minimap with important marks:

● After you completed the grenading and bazooka shooting part, get the jeep and stop by the
 little wooden house by the crossroads. Turn on the switch on the side of the table.

● Carry on, and test the new diving equipment. Drive the jeep back to the garage. Now you can drive the
 truck too, get in and go forward a few meters. Climb on the truck, and on the roof from the
 truck. Pick up the golden bar in the left corner on the roof.

● Then complete the explosives part and head back where you started (Except if you do it in Lone Wolf mode,
 because the mission is over at this point.).
 Don't go to your team, go back to the Browning machinegun, and have fun!

This one works on the later versions too. But you can't climb on vehicles in the later versions, so to get on the roof is a little bit tricky. When you drive back the jeep, park it front of a column by the truck. Get in the truck, park it closer to the wall, so when you get out you stand on the jeep. From the jeep you can jump on the hood of the truck, then you can jump on the top of the truck, it's important that you parked the truck right, so you can climb up to the roof from there.