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Home >> Mercedes Benz >> 2019 >> CLS450 Base >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Engine Cooling System - 257 Chassis >> Maintenance >> Replace Main Circuit Coolant - AP20.00-P-2082M

Replace Main Circuit Coolant - AP20.00-P-2082M

Engine 256.9, 264, 654, 656 in model 257 

Shown on engine 256.9 in model 257.3 

G14547910Courtesy 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 
Notice Notes on coolant   AH20.00-P-2080-01KOA 
INSPECT Check     
1 Check coolant level in coolant expansion reservoir (2).   AP20.30-P-2050K 
  Drain off     
2 Drain off coolant. Engine 256.9, 264, 654, 656 in model 257  
REFER TO TESTING & REPAIR   Engine 256.9 in model 257 AR20.00-P-1142MSA 
REFER TO TESTING & REPAIR   Engine 656 in model 257 AR20.00-P-1142OIB
  Pour in     
3 Pour in new coolant. Engine 256.9, 264, 654, 656 in model 257  
REFER TO TESTING & REPAIR   Engine 256.9 in model 257 AR20.00-P-1142MSA 
REFER TO TESTING & REPAIR   Engine 656 in model 257 AR20.00-P-1142OIB
REFER TO CAPACITIES & SPECIFICATIONS Coolant specifications   BB00.40-P-0310-01A