Having dealt with medicial equipment & parts made in various parts of the world for many years, I would say there is a HUGE difference in quality of products made in China (pure garbage/junk) vs Japan or Korea (quality on par with Europe/North America).

So it is truly sad if Mercedes parts are now being manufactured in China. Even ISO 9001 certifications means nothing in China, as they have routinely been dealt out like candy by corrupt officials.