I just did the A Service on my C280 last weekend. It took less than an hour to 1) R&R the Hengst fleece oil filter and oil; 2) R&R the engine air filter; R&R the Bosch cabin filter and to do the inspections, check fluids and reset the dash reminder.

Ordered everything but the oil online, delivered to Honolulu, and the total with shipping, including the 8 qt of Mobil 1 was just under $100.