Based on family experience for w211 E240, 2004-2010, Typical 10k services cost about 600-700 without the Fully Synthetic engine oil ( 5.5 Liter). Service at non sc but benz expert.

once that cost much is when changing gear oil, the shop said need to flushing as well. Iinm it cost about 10liter gear oil inclusive the flushing at rm55/liter.

Changing the all absorber cost like 3-4k for all inclusive all installation.

Changed to a brand new Japan 2.4 car. Service were all headache free with all cost less than 1k except major service based on mileage.