Mercedes-Benz GL-Class, X166 (USA / CAN)
Transfer case fluid capacity & service interval
Mercedes-Benz GL-Class, X166 (USA / CAN) uses transfer case fluid with a capacity range of 0,5 to 1,5 liters. The data covers 3 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| GL 350 BlueTEC 4MATIC, 166.824 (2011-2015) |
|
| GL 450 4MATIC, 166.872 (2011-2015) |
|
| GL 550 4MATIC, 166.873 (2011-2015) |
|
Additional Notes
- Across all three configurations of the Mercedes-Benz GL-Class X166 covered here, the transfer case fluid capacity splits into two distinct values depending on the unit fitted: 0.5 liter for the standard transfer box and 1.5 liters for the dual-range version.
- The 1.5-liter figure associated with the dual-range transfer box represents three times the volume of the standard unit, reflecting the additional mechanical components housed within a dual-range assembly.
- The 0.5-liter capacity applies to the standard transferbox across the GL 350 BlueTEC 4MATIC (166.824), GL 450 4MATIC (166.872), and GL 550 4MATIC (166.873) for model years 2011-2015.
- The dual-range transfer box capacity of 1.5 liters is likewise shared identically across all three engine variants for the same 2011-2015 model year span, indicating no differentiation in transfer case fluid volume between the diesel and gasoline powertrains when the dual-range unit is present.
- Both capacity values are listed under normal use conditions, meaning neither figure is tied to a severe-duty or first-change-only service scenario.
- A service fill, which refers to the fluid quantity needed during a routine drain-and-refill, would typically fall at or near the lower 0.5-liter figure for the standard unit, while an overhaul or complete fluid replacement on the dual-range assembly would require the full 1.5-liter volume.