I recently replaced my water pump, ac belt, serpentine belt, and radiator fan on my 2002 325i e46 and when I went to start the car all the lights were working but when I tried to start there was nothing. I checked the battery I don't have a multimeter but I got my friend to charge the batter with jumpers and we tried it twice with no luck. I check all the fuses and they are all good. I also think I can hear the fuel pump when I turn the ignition. if it helps the car is also a manual. I have seen some people talking about the key being the problem but I'm not sure what to do. Any ideas?