D5mo_h

Hi all I'm new here my names damo this is my second ml55 I'm having a bit of bother tho. It starts fine and drives great under normal driving but as soon as you try to go over 3500-4000rpm it goes limp I've changed air flow but no joy

Any help would be great thanks

Chrisblack99gt

Far more information is required to even start diagnosing this issue. What codes are being set would be the first important question....