I replaced the plugs and MAF on my 97 W210 because the car was hesitating on take off. Once those were replaced, the hesitating stopped...now I get sputtering at idle and at the beginning of take off. I didn't do the wires yet, but just ordered them this morning as one of them hada crack in that lil foam part. Also, that wining that come from the fan when it comes on...I hear that going on and off sometimes. Before, it used to come on for a period of time in the morning, then go off. Now, it comes on and off through my driving. Any suggestions? I'll keep you guys updated once the wires get here.