I likely won't update the forum every time we have a price change on a service, so for interested forum members your best bet is to shoot me an email and let me know you're a ML forum member for pricing.
Our pricing structure relies heavily on how much I'm paying for parts and fluids, and I am constantly searching for better sources to keep my overhead and prices low, so they can (and will) change over time.
That being said, I briefly had no better choice than to purchase grossly over-priced oil and filters from the dealer which is why we bumped the oil change price. I have since found another distributor where I can source parts a semi-reasonable price level.
Still the same OE Maserati parts and filters, still top shelf oil and fluids as always, and we're back down to our normal price of $225 for ML members. That goes for wet sump and dry sump cars, as there is very little difference in the oil change procedure and no difference in cost.
-philip