Remove/Install Oil Separator On Crankcase - AR01.20-P-9692MRA

Engine 274.9 in model 205 

except code 494 (US version) 

except code 945 (China Stage 6 exhaust treatment) 

Engine 274.9 in model 253 

except code 494 (US version) 

except code 945 (China Stage 6 exhaust treatment) 

Shown on engine 274.9 in model 205 (except 205.047/147/247) 

Fig 1: Oil Separator On Crankcase Components Location - Engine 274.9 In Model 253 Except Codes 494; 945 (Shown In Model 205)

Courtesy of MERCEDES-BENZ USA

	Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers.	AS18.00-Z-0001-01A
	Risk of death  when working on component parts and systems with U > = 30 V alternating voltage (AC) or U > = 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. Engine 274.9 in model 205.047/147/247 except code 494 (US version) except code 945 (China Stage 6 exhaust treatment) Engine 274.9 in model 253.354/954 except code 494 (US version) except code 945 (China Stage 6 exhaust treatment)	AS00.00-Z-0035-01A
	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
	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
	General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system	Engine 274.9 in model 205.047/147/247 except code 494 (US version) except code 945 (China Stage 6 exhaust treatment) Engine 274.9 in model 253.354/954 except code 494 (US version) except code 945 (China Stage 6 exhaust treatment)	AH00.00-Z-0300-01A
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove/install
1	Perform power disconnect of high-voltage on-board electrical system.	Engine 274.9 in model 205.047/147/247 except code 494 (US version) except code 945 (China Stage 6 exhaust treatment)	AR54.10-P-1150LW
		Engine 274.9 in model 253.354/954 except code 494 (US version) except code 945 (China Stage 6 exhaust treatment)	AR54.10-P-1150LVH
2	Remove left front engine carrier.		AR22.10-P-4325LWA
3	Remove full load crankcase ventilation system (3) from bottom oil separator (2).		AR01.20-P-0002MRA
4	Remove screws (2s) and take bottom oil separator (2) off crankcase and remove.	: Replace seal. Bolt, oil separator to crankcase	*BA01.20-P-1002-01R
5	Install in the reverse order.
	Risk of burn injuries  , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning  caused by skin contact with solid components of the exhaust.	Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.	AS49.00-Z-0001-01A
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
6	Perform engine test run. While doing so, check engine for proper operation and leak tightness.