Why do you care about M-B's quality?
A new M-B comes with a 4 year warranty which can be extended if you
choose to keep the car longer.
So the bother is yours but the repair and replacement cost is theirs -
and they're learning that - BIG TIME!
I'm sure that after ten minutes with BMW's i-drive you'll come running
back to quality deficient M-B.
Cars have become overly complicated to justify their high price points,
and complexity breaks.
That's the real problem, IMHO.