I need to replace the motor mounts on my 1989 300SE. Is this a "do-it-yourself" job? Is there a guide available here for me to consult? Any insight would help.

 

it's a DIY job. Not hard at all. Loosen the mount, lift engine a bit, with a jack and a nice wide block of wood, slide old mount out ,slide new one in and tighten it down, call it a day. Keep in mind the new one will seem to take up more space usually if the old ones was worn and compressed.