Quote Originally Posted by cruzanrs6 View Post
Do you know off the top the measuring blocks for the fuel trim (lambda) on the RS6 ?

Thanks
001 shows it in the rightmost 2 windows.
As suggested by Mark, can also try unplugging MAFs. Will make the car run on "limp home" fueling & mostly eliminate up-throttle leaks contribution to the issue. See if that makes it idle okay-ish.