guys i have had this problem with the car hesitating or studdering while im excelerating in 3rd usually it seems much more noticeable when there are more people or weight in the car.just cleaned the k=n filter and it didnt help got 124000 kms on my 2001 cls and the plugs have not been done yet but the book says they are good till 168 000 gonna changem anyway but im worried about this problem cause its not constant and it will be hard to diagnose.
anyhow this is my delema and i was wondering if anyone has any ideas what this could be???

 

Did you not remember that you posted this earlier?

https://acurazine.com/forums/showthread.php?t=179627