Just flashed my N54 AT 135i with MHD for the first time. I used the Stage1 91oct map. In the options, I selected catted downpipes (which I have) and exhaust burble to 1sec/1sec and "soft". Didn't hear any burble. Upped it to 1sec/1sec "hard", still nothing.
Is this a feature that only works with catless downpipes or something?
Is this a feature that only works with catless downpipes or something?