Eliminate the convoy to the right then proceed to the radar station. There's an MG emplacement ahead. Get behind the pickup truck and push it so you can get near while taking cover. You'll have to peek and kill the other enemies since they'll be able to shoot you from the sides.
After pushing the truck all the way you can, you can flank the MG by taking the route to the left. Once the MG has been taken out, enter it and use it to eliminate the remaining enemies in the station. Enter the building to complete the section.
How do I ouch the truck