Service A / Service B
About 25,000 km or 1 year (ASSYST)
25 000 km
12 months
Oil and filter at each service; Service B adds filters and wider checks. The ASSYST indicator prevails.
Source [1]X167 · 2019–…
Mercedes GLS GLS 450 4MATIC X167 · 367 hp (2019 to date)
The Mercedes GLS GLS 450 4MATIC of the X167 generation uses the M256 3.0 I6 petrol engine with 367 hp.
Choose an engine
Identify the car and prepare its maintenanceTechnical specifications
- Fuel
- Petrol
- Power
- 367 PS / 270 kW
- Displacement
- 2 999 cm³
- Cylinders
- 6
- Engine code
- M256 3.0 I6
- Period covered
- 2019–…
- Documented market
- Europe
Transmission
- Automatic · 9 speeds
Figures apply to the cited configuration and market; equipment and transmissions may vary by production date.
Specification source : [1] AutoKarnet
This version
367 hp (270 kW), 4MATIC all-wheel drive, 9-speed automatic. Built from 2019 to date. 48 V mild hybrid: a small starter-generator assists the engine when pulling away and accelerating; the 48 V battery needs no routine maintenance.
AutoKarnet advice
In the range
It is the entry-level petrol version of this generation. The M256 3.0 I6 engine is also fitted to: Mercedes Classe E (W213), Mercedes Classe E (W214), Mercedes CLS (C257), Mercedes Classe S (W222), Mercedes Classe S (W223), Mercedes GLE / ML (GLE W167).
AutoKarnet advice
Maintenance and records
Brake fluid
Every 24 months
24 months
Time-based replacement, whatever the mileage.
Source [1]Questions about this version (2)
Which engine is in the Mercedes GLS GLS 450 4MATIC X167?
The M256 3.0 I6 petrol engine (2 999 cc), 367 hp (270 kW).
AutoKarnet advice
Which oil for the Mercedes GLS GLS 450 4MATIC?
A MB 229.5 / 229.51 / 229.52-approved oil suited to the M256 3.0 I6 engine.
AutoKarnet advice
Documentary sources
- [1] Rédaction AutoKarnet
AutoKarnet · FR · Europe · Synthèse éditoriale AutoKarnet · Accessed 09/10/2026