Garage Cabinets, Garage Storage, and Garage Organization

Hey all,
I was driving my mercedes G 320 and suddenly the dashboard lights turned on and the car stull. I had problems with the battery before, so I decided to purchase a new battery. However the car was over heated and notices that the radiator had a leak. I went and fix the radiator, once I put the radiator back and crank the car it wasn't starting like before, I had to give it some gas. I change the engine oil and oil filter. The car still had some problem starting. What could it be?

start with the plugs and plug wires see if it helps.