Manual says 8.0 quarts(US) with a filter change.
The 2001 Mercedes-Benz SLK-Class has 16 valves.
The 2001 Mercedes-Benz SL-Class has 24 valves.
The 2001 Mercedes-Benz E-Class has 18 valves.
The 2001 Mercedes-Benz CL-Class has 24 valves.
The 2001 Mercedes-Benz S-Class has 24 valves.
The 2001 Mercedes-Benz C-Class has 24 valves.
The 2001 Mercedes-Benz M-Class has 18 valves.
5 quarts
8 quarts...
8.44 quarts
8.5 quarts.
According to the manual it is 8.5 US quarts