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Home >> Mercedes Benz >> 2022 >> GLE580 >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System -- 167 Chassis (2 Of 2) >> Maintenance >> Check Main Circuit Coolant Level - AP20.30-P-2050N

Check Main Circuit Coolant Level - AP20.30-P-2050N

Engine 176, 177, 256, 264, 274, 654, 656 in model 167 

Shown on engine 176.9 in model 167.186 

G15030822Courtesy of MERCEDES-BENZ USA

Shown on engine 654 in model 167.119 

G15030823Courtesy 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 area of coolant expansion reservoir joint (3) of coolant expansion reservoir (2). If the coolant level is above the coolant expansion reservoir joint (3),

coolant level correct, check complete, no further operations steps necessary.
If the coolant level is below the coolant expansion reservoir joint (3),

check coolant level in coolant expansion reservoir (2), continue with operation step 2.
 
REMOVING Remove     
2 Unscrew the cap (1) of the coolant expansion reservoir (2).    
INSPECT Check     
3 Check coolant level. IMPORTANT With a cold engine, the coolant level must reach the marking (arrow) in the coolant expansion reservoir (2). When the coolant is warm: approx. 1 cm (0.39 inch) above the marking (arrow).
If the coolant level is too low,

Check cooling system for leak tightness and coolant for antifreeze content.
 
REFER TO CAPACITIES & SPECIFICATIONS   Coolant specifications
IMPORTANT After obtaining special order.
BB00.40-P-0310-01A
INSTALLING Install     
4 Seal coolant expansion reservoir (2) with cap (1).