Lot of times, and for what i see Motronic never should goes lean than lambda 1, that's my question.
So if it never goes leaner than lambda 1, what does it matter if it's 1.25 or 5.0 or 10.0 in that map?
I suggest looking at LAMBTS module whole calculation, especially DLBTS and DZWETA and understanding why someone might choose to put something higher than lambda 1 into the KFLBTS map.
Also, looking at LAMKO might help.