I have a s550 m.Benz 2007 and everytime I apply the gas pedal it feels very weak on 2007 Mercedes-Benz SL550

The speedometor is down to almost "0"
What can it be? Should I be worried. ?
I'm not getting any (check-engine)

Asked by for the 2007 Mercedes-Benz SL550
need more info to adv
2 more answers
need more info to adv
im not sure what you are talking about/be more specific also include milage and last date of major service B