rickjack, the problems have been covered many times on the W220 forum. The problems that occur with the cars in Malaysia are likely similar to those found elsewhere in the world. If you want more than Streetglower has provided, do a search using terms such as "W220" "S500" "S430" "reliability" "problems" in various combinations - you'll come up with discussions. When you come across one of more strings, you'll also see related links at the bottom of the page. Otherwise, you're asking us to do your research for you, or to repeat work that we have already done - rather than fulfilling the forum's purpose of sharing information.