Hello
Don't be furious, don't charge away in front of a MG42 or any MG! Never charge at a group of 5-6 enemies(probable a squad, but throw 'nades if you have)! If you see armor, call reinforcements and hide fast(if you are AT kit or Engineer with Demo-Charges, wait it to go away the building and shoot it's back)! Before getting in a plane, take the pilot kit! If you are shooted down(in a plane), parachute, kill a enemy on the ground with your trusty pistol, take his kit, get a transport and capture the enemy flags!If someone sees you, be careful at things!
1)Get in a building. If you are a scout, get to 2nd floor, put a mine on the stairs and he is done. If not, look at point 2)!
2)He will throw 'nades, so take cover behind EVERYTHING who can save you! If you don't have cover, jump over the wall and shoot him!(Look at point 3)
3)Be sure that he will call reinforcements, so call you too!
4)If you don't have a building close, take cover behind a wall and look at point 2) to avoid the grenade.
5)If there is ABSOLUTELY no cover, be sure that you must fight with him!
Hope this guide will help you!