Check Coolant Level For 48 V On-Board Electrical System Coolant Circuit - AP20.00-P-2015OA

Engine 176, 256, 656 in model 223 with code B01 (48V technology) 

Shown on engine 256.9 in model 223.163 

Courtesy of MERCEDES-BENZ USA

	Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning  from swallowing coolant.	Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
	Risk of injury  from engine start by remote start function	Prior to starting work, open engine hood, do not reach into rotation range or hazard area of freely rotating parts, wear closed and snug-fitting work clothes	AS00.00-Z-0024-01A
Notice	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment		AH00.00-Z-0300-01A
Notice	Notes on coolant		AH20.00-P-2080-01KOA
	Remove
1	Unscrew cap (1) from coolant circuit coolant expansion reservoir for 48 volt on-board electrical system (2).
	Check
2	Check coolant level.	With a cold engine, the coolant level must reach the marking (arrow) in the coolant circuit coolant expansion reservoir of the 48 V on-board electrical system (2). When coolant is warm: approx. 1 cm (0.39 inch) above marking. If the coolant level is too low, ↓ Check cooling system for leak tightness and coolant for antifreeze content.
		Coolant specifications After obtaining special order.	BB00.40-P-0310-01A
	Install
3	Use cap (1) to seal coolant circuit coolant expansion reservoir for 48 volt on-board electrical system (2).