2018 Mercedes-Benz GLS-Class Coolant: Specs & Service

The 2018 Mercedes-Benz GLS-Class uses a liquid cooling system that needs both the right coolant condition and a sound, leak-free circuit. At Mercedes-Benz of Draper in Draper, UT, a coolant service includes draining and refilling with the manufacturer-specified coolant type and concentration, pressure testing the system, and inspecting key components. This matters because coolant additives gradually deplete even while the fluid continues to cool the engine. Booking service helps identify whether the vehicle needs scheduled coolant replacement or whether a low level points to a leak requiring attention. If you notice a rising temperature gauge, a sweet smell, a puddle, or cloudy-looking coolant, schedule service with Mercedes-Benz of Draper.

What a coolant service on a 2018 Mercedes-Benz GLS-Class involves

A coolant service on a 2018 Mercedes-Benz GLS-Class begins with draining the existing coolant from the cooling system. The system is then refilled with the coolant type and concentration the manufacturer specifies for this vehicle. Using the specified formulation matters because coolant products are not automatically interchangeable, and the additive package must protect the system as intended.

After the refill, the cooling system is pressure tested for leaks. The inspection also covers the hoses, the cap, the radiator, and the area around the water pump. These steps help distinguish coolant that has reached its service interval from a system that is losing fluid through a leak. A level that repeatedly drops needs inspection rather than repeated topping off. To have the coolant condition and system pressure checked, schedule service at Mercedes-Benz of Draper.

Why coolant condition matters on a 2018 Mercedes-Benz GLS-Class

Coolant does more than carry heat away from the engine. Its additive package helps limit corrosion inside the aluminum components and protects gasket surfaces that the fluid contacts. Those additives deplete on a timetable of their own, even when the coolant still looks like coolant and continues to move heat through the system. That is why condition is judged by the manufacturer's service schedule and by testing, not by appearance alone.

The 2018 Mercedes-Benz GLS-Class uses an engine range from 3.0 to 5.5 liters across its trims, with six- to eight-cylinder configurations. An engine cooling system working under normal operating demands still depends on effective coolant protection. A higher-than-usual temperature gauge, sweet smell, puddle under the front of the vehicle, or rusty, cloudy, or low coolant in the reservoir deserves attention. Testing at a service visit helps determine whether replacement or leak repair is the appropriate next step.

Cooling system service at Mercedes-Benz of Draper

Mercedes-Benz of Draper provides coolant service for the 2018 Mercedes-Benz GLS-Class at 11548 Lone Peak Parkway, Draper, UT 84020. The visit is designed to answer two practical questions: whether the coolant needs service according to the manufacturer's schedule and whether the cooling system is holding pressure. The service includes draining and refilling with the specified coolant, pressure testing for leaks, and inspecting the hoses, cap, radiator, and water pump area.

That distinction matters when a reservoir level is low or keeps dropping. A refill may restore the level temporarily, but it does not restore depleted additives or correct a leak. Bring the vehicle in for testing if the temperature gauge runs higher than usual, a sweet odor appears, or you see a puddle. Call 385-425-5461 or schedule service at Mercedes-Benz of Draper.