Received my new Mityvac and changed oil and filters.
Changing oil in a Merc is a piece of cake. The dealer wants $300 for it. I chose to buy the best oil for it and known good parts and do it myself.
The oil was too dark (not sludgy but almost black) for my liking and I won't go by the maintenance minder anymore. Either the dealer put crap oil during the last change or 18,000km was too long, or maybe there is nothing really to worry about but I will reduce the oil change interval to about 10k.
Anywho, 2 jugs of Mobil1 0W40 from Walmart USA, a new Bosh oil filter, Mann air filters (the old ones looked like they were never changed and filled with sand and dry insects) and the engine is purring like a kitten.
Ordered Denso Iridium plugs and those will go in next by the end of the week.