Thank you , thank you everyone for your expert advice!! Zip439 thank you for letting me know my 2004 coupe is a 2003 SLK320, has made finding parts and information much easier. Since the car has low miles and had not been driven much and I was getting the P0410 code I changed sensors, MAF, MAP, Cam, Crank and air pump. The CEL is now gone!!!! I am still getting code but will do some drive cycles and see if it corrects itself.

Again thank you all so much for your patience and advise!! I am going out now to see how she drives