I'm replacing the cylider head and timing chain guide rails on a '92 190 2.6; no major problems except identifying Top Dead Center -- markings aren't too clear, although there is a hole that might be the marker. I posted a couple pics on Ofoto if you want to take a look. Thanks for your help.

http://www.ofoto.com/I.jsp?c=rat9q07.5irdgwqb&x=0&y=26wjnb