I'm running biodiesel and want to change my fuel filter.
Can someone tell me how to do this and are there any tricks to it?
Is there a pre-filter and if so, where is it?
I'm new to this forum, so thanks in advance!
97 E300

 

See the link for procedure.
A bit older engine, I presume this still holds. Might as well do the purge..

 

http://www.mindspring.com/~houlihan/merc/purge.htm

This being the link. Sorry.