I beleive the quality is still there in todays Mercedes automobiles, but many of the models now have been cut down to a price thanks to increased competition since the mid to late eighties from other maunufacturers.
M-B can no longer just charge whatever price they want today

Additionally i beleive people today are more demanding than ever in regards to other merchandise. We expect the manufacturer to be held accountable for everything including normal wear and tear it seems on items like, shoes, automobiles, clothing, etc.