The fluid level is best at about 1 to 1 1/2 in from the top of the reservoir. The lid is on top of a silver cylinder located on the top left of the engine. (The top left of the engine is as you are sitting in the car IE the right side as you are standing in front of it), There is a small plastic black knob on top, unscrew it counter clockwise and lift off the silver cap.
ASE CERTIFIED MASTER AUTO TECHNICIAN
LEAD TECHNICIAN FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM