Hi, been having this problem for quit a while. My car on undergoing hard acceleration gives sounds that seem to come from the exhaust. Sound only comes on between 2500-3000 rpm (In 3rd gear). On bringing it to the local dealer. They said most probably its the catalytic converter. Replaced the catalytic converter. Thing is, problem still exists. Only possible ideas?
Thanks, any help is greatly appreciated.
MB W124 1994 E200