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Home >> Mercedes Benz >> 2025 >> S580 >> Repair and Diagnosis >> Engine Mechanical >> Cooling Fan >> Engine -- Cooling System (2 Of 2) -- 223 Chassis >> Maintenance >> Replace Coolant For 48 V On-Board Electrical System Coolant Circuit - AP20.00-P-2014OA

Replace Coolant For 48 V On-Board Electrical System Coolant Circuit - AP20.00-P-2014OA

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

Shown on engine 256.9 in model 223.163 

G16189120Courtesy of MERCEDES-BENZ USA
WARNING 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
WARNING 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
INSPECT Check     
1 Check coolant level in coolant expansion reservoir for 48 volt on-board electrical system coolant circuit (2).   AP20.00-P-2015OA 
  Drain off     
2 Drain coolant in 48 volt on-board electrical system coolant circuit. Engine 176, 256, 656 in model 223 with code B01 (48V technology)  
REFER TO COMPONENT MODIFICATIONS   Engine 176 in model 223 with code B01 (48V technology) AR20.00-P-2014SC
REFER TO TESTING & REPAIR   Engine 256.9 in model 223 with code B01 (48V technology) AR20.00-P-2014SB
  Pour in     
3 Pour new coolant into 48 volt on-board electrical system coolant circuit. Engine 176, 256, 656 in model 223 with code B01 (48V technology)  
REFER TO TESTING & REPAIR   Engine 176 in model 223 with code B01 (48V technology) AR20.00-P-2014SC
REFER TO TESTING & REPAIR   Engine 256.9 in model 223 with code B01 (48V technology) AR20.00-P-2014SB
REFER TO CAPACITIES & SPECIFICATIONS Coolant specifications   BB00.40-P-0310-01A