I'm having trouble with my 2000 slk 230. It ran perfect when i first bought it about 2 years ago. About 3 months ago it began to run kind of rough and the check engine light came on. I researched it and determined that it was the k40 relay. I bought a new one and replaced it instead of repairing the old one(which was burnt and I still have).It started a couple of times but ran even worse. But now it won't start at all. The engine light is off now but it seems like it's not getting any gas. I poured some gas into the throttle body and it started up but as soon as that gas burned it begin to sputter and cough and then it died. It won't start back unless I add gas to the throttle body. I am a female and I don't know much about cars but I can learn. Your help would be greatly appreciated. Oh yea....it has gas in it(lol).