"Set and detonate explosives on the enemy truck in 'Officer hunt in the Loue Valley' mission"

The text is a bit misleading. The explosives are not set "on" the truck itself but on a rock face the truck has to pass.


1.
After the first truck has driven away (cut scene), make your way down to the stream and from there to the boulder at the right side of the entrance to the road leading down to the house with the Nazi's outside. To not be spotted, use crouch and go to the right side of the bridge (it helps to get into the stream and pass underneath the bridge to the right side). Then cross the road out of view of the enemy and go to the yellow explosives indicator.
Note on the stationary truck at the top of the hill:
If you use this truck in your attack (by removing the obstruction at the wheel), you will miss the chance to get the achievement.

2.
Hold down F to access the timer.
Use the W (up) and S (down) keys to set the fuse to 10 seconds.
Now wait.
Pressing F again will activate the timer, however, timing plays a role here, so don't yet activate the bomb. Wait for the driver of the second truck to run to the truck and start the engin. You will be able to clearly hear him run and then get the truck going without seeing him do it (you can "see" him move on the round mini map). As soon as the truck starts driving, activate the bomb by pressing/holding F.

3.
Run back across the road to safety. When the 10 seconds have passed, the truck should be right next to it. KA-BOOM!

[provided by Gaius]
Set the timer to 0 and go back across the road towards the starting point. Shoot the bomb when the truck passes it.

Duration: 2:30