1) There's a lot of manuals for sale on Ebay. Do a search for "mercedes man*". Also can purchase one from MB at 800-367-6372.

2) I believe its on the driver's side toward the front of the engine. The little black cap.

3) The owners manual will tell you which plug is preferred.

__________________
Regards . . . . JimF
-------------------
'94 S500 Cpe

Visit my Mercedes Web Page