Buy Eml Series E100 BMW EML Problem! Read Please?

BMW EML problem! read please? - buy eml series e100

Hello, I just bought a few days ago, BMW, second hand (I can not go back). Today I went for a walk and light on the LME () is about halfway though my car and "!" In the triangle began to blink. I went to start the engine and the fault seems to have disappeared. Later that day, I get the same error, I heard again disappeared and the problem can someone tell me, what can that be? and how much it would cost to fix it!? It's a 2003 316i SE 1.8 engine.