Remove/Install Coolant Circuit Vent Line Of Left Turbocharger - AR20.20-P-1200MNG

Engine 177 in model 253 

Fig 1: Left Turbocharger Coolant Vent Line Component Location - Engine 177

Courtesy of MERCEDES-BENZ USA

	Risk of injury  to skin and eyes suffering scalding from contact with hot coolant spray. Risk of poisoning  from swallowing coolant.	Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
	Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Notes on coolant level		AH20.00-P-1142-01CW
	Remove/install
1	Remove return line (1) of turbocharger coolant circuit		AR20.20-P-1101MNG
2	Open heat shield in area of vent line (2)
3	Remove clamp (3) from vent line (2)	Commercially available devices/tools  Clamping pliers Replace clamp (3).
4	Remove vent line (2) from return line (1)	Replace compression ring (4).
5	Install in the reverse order