OMG please help. I was having problems the other day with my battery. I had to jump it a few times and then got it home and bought a new battery. Everything at this point ran fine except the battery. I changed out the battery. Now My car won't even run. It starts up.. revs high for about 20 sec then drop out and stalls. I try to press on the gas and there is no/late response and the rpms are all over the place. I'm driving 99 SLK230 with 56,000 miles. I have tried resetting the ECU by disconnection the battery but have no luck.. What could this be? What can I do? Any ideas?