HAVE a 97 e320.

car had bad idling and running rough.

up to date i have replaced plugs and coil connectors to plugs.
now idles smooth but rough when revving and flooring the car it will hesitate and battle to reach rpm.
it will rev to red line but takes a while getting there.
when i drove it for a while yesterday it felt like it was getting better and would accelerate better.
was unsure of the coils .....i replaced earlier. it made no difference.

the car right now is still rough and wont rev.....no check engine light or any codes.

PLEASE HELP.......NOT SURE WHAT TO DO NEXT