stutters

Hello guys! I`m having some trouble with my C250 CDI. When i start the car for the first time (doesn't matter if it's morning or noon), the car idles alrdight but lacks power when driving away. Also, it feels like it's choaking when i don't give it alot of gas. If i floor the gas peddal, it...

My new toy, c230 sport estate Komp, has a bad habit of stuttering badly when the gas pedal is pressed firmly. I don't just mean the carpet denting foot slammed to the floor type firmly either. When driven gently and with gradually increasing pedal pressure its fine and responsive, but very...