Where is the coolant added in a Mercedes-Benz?

[Ken]

Mercedes-Benz coolant is added at the front of the engine under the hood. The steps for adding coolant are: 1. Unscrew the radiator cap, open the radiator drain valve, and drain the antifreeze; 2. Insert a rubber hose into the radiator filler port and flush the engine cooling system with tap water; 3. After draining the water from the cooling system, close the radiator drain valve; 4. Unscrew the reservoir cap and add antifreeze until the liquid level reaches the MAX mark; 5. Tighten the reservoir cap; 6. Start the engine and let it idle for 2-3 minutes, then unscrew the radiator cap to release air from the cooling system. The antifreeze level will drop, so top it up again to the MAX mark.