Mercedes-Benz GL-Class: Checking the coolant level - Checking and adding other serviceproducts - Engine compartment - Maintenance and care - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Checking the coolant level

Only check the coolant level when the vehicle is on a level surface and the engine has cooled down.

Turn the SmartKey to position 2 in the ignition lock.

On vehicles with KEYLESS-GO, press the Start/Stop button twice.

Check the coolant temperature gauge in the multifunction display.

The coolant temperature must be below 158 °F (70 °C).

WARNING In order to avoid any potentially serious burns: 
In order to avoid any potentially serious burns:
use extreme caution when opening the hood if there are any signs of steam or coolant leaking from the cooling system, or if the coolant temperature display indicates that the coolant is overheated.
do not remove the pressure cap on the coolant reservoir if the coolant temperature is above 158 °F (70 °C). Allow the engine to cool down before removing the cap. The coolant reservoir contains hot fluid and is under pressure.
using a rag, slowly turn the cap approximately 1/2 turn to relieve excess pressure. If opened immediately, scalding hot fluid and steam will be blown out under pressure.
do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts.

► Slowly turn cap 1 half a turn

Slowly turn cap 1 half a turn counterclockwise and allow excess pressure to escape.
Turn cap 1 further counter-clockwise and remove it.

If the coolant is at the level of marker bar 3 in the filler neck when cold, there is enough coolant in coolant expansion tank 2.

If the coolant is approximately 0.6 in (1.5 cm) above marker bar 3 in the filler neck when warm, there is enough coolant in coolant expansion tank 2.

If necessary, add coolant that has been tested and approved by Mercedes-Benz.
Replace cap 1 and turn it clockwise as far as it will go.

For further information on coolant, see.

    Windshield washer system andheadlamp cleaning system
    The washer fluid reservoir is used for both the windshield washer system and the headlamp cleaning system. Vehicle components and their service products must match. You should, therefore, only ...

    See also:

    Towing safety
    Trailer hitch Your vehicle is equipped with a trailer tow package. The trailer tow package includes a receiver-type frame mounted hitch. This hitch is rated for the maximum towing capacity of ...

    Securing an Add-On Child Restraint in the Vehicle
    WARNING A child can be seriously injured or killed in a crash if the child restraint is not properly secured in the vehicle. Secure the child restraint properly in the vehicle using the vehicle ...

    Important safety notes
    WARNING   For reasons of safety, have the NECK-PRO head restraints/NECK-PRO luxury head restraints checked at an authorized Mercedes-Benz Center after a rear-end collision. WARNING&nbs ...