Here is a post that Stevebfl wrote, where he talked about Nippondenso compressors and black death:

http://www.peachparts.com/shopforum/showthread.php?threadid=40718&highlight=black+death

If the compressor goes, it might be impossible to flush out the system.....

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".