Mercedes-Benz GLS X167
Weaknesses, engine ratings and buying advice
476–612 PS
4.0L V8 BiTurbo AMG Benzin
612 hp three-row — the most muted V8 in the M177 lineup
Fun to Drive!Generations
Engine Overview
The Mercedes-Benz GLS X167 is available with 7 engine variants — from 272 to 612 hp. 1 variants had engine changes — the model year is crucial.
The Mercedes-Benz GLS 350d (Diesel, 286 PS) has the OM656 (2.9L R6 Diesel) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz GLS 400 d (Diesel, 340 PS) has the OM656 (2.9L R6 Diesel) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz GLS 400d (Diesel, 330 PS) has the OM656 (2.9L R6 Diesel) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz AMG GLS 63 (Benziner Mild-Hybrid, 612 PS) has the M177 (4.0L V8 BiTurbo AMG) — rated: "Be Careful", 8 known weaknesses.
The Mercedes-Benz GLS 450 (Benziner Mild-Hybrid, 367 PS) has the M256 (3.0L I6 Turbo) — rated: "Be Careful", 9 known weaknesses.
The Mercedes-Benz GLS 580 (Benziner Mild-Hybrid, 489–517 PS) comes with 3 different engines: M176 (2019–2025, Be Careful) und M177 (2020–2025, Be Careful) und M177 (2023–2025, Be Careful). Pay attention to the model year for the GLS 580!
The Mercedes-Benz Maybach GLS 600 (Benziner Mild-Hybrid, 557 PS) has the M177 (4.0L V8 BiTurbo AMG) — rated: "Be Careful", 8 known weaknesses.
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Recall: 48V earth connection fire hazard The 48V earth connection under the passenger seat was fastened with insufficient torque. High currents raise junction temperature — fire risk. 52,363 vehicles affected. Symptoms: Burning smell at passenger seat, fault in 48V electrical system, fuse blows | Low | |
| Recall: A/C condensate — fire risk Incorrectly routed A/C condensate drain hoses allow water ingress into the interior. Contact with electrics causes short circuits. 171,463 vehicles affected. Symptoms: Wet mat under dashboard, short circuits, eCall activates, engine limp mode | Low | |
| MBUX System Crash and Sluggish Response MBUX shows crashes during extended operation (black screen). Total failures occur especially after long drives over 400 km. Software updates often only provide temporary relief. Symptoms: Black screen while driving, no radio, no navigation, voice control unresponsive | Medium | |
| MBUX system freezes The MBUX infotainment no longer responds to inputs or displays frozen content. After software updates, stability sometimes worsens. Symptoms: Touchscreen frozen, navigation display outdated or black, climate control blocked | Low |
Top Reported Issues
Alternatives
Volvo EX90 I
Großer SUV (2023–2026)
BMW XM G09
Großer SUV (2022–2026)
Land Rover Range Rover Sport L461
Großer SUV (2022–2026)
BMW iX I20
Großer SUV (2021–2026)
Land Rover Range Rover L460
Großer SUV (2021–2026)
Toyota Highlander XU70
Großer SUV (2021–2025)
Known Problems and Issues
A total of 38 weaknesses have been documented for the Mercedes-Benz GLS X167 (2019–2025) — 32 engine-related and 6 vehicle-related. Typical issues affect Electronics, Gearbox, Suspension.
GLS (OM656, 2019–2025) — Be Careful: Recall Coolant Pump — Fire Hazard (Action Code 2090008), Bosch CP4 Pump Sensitive to Fuel Quality, Coolant Pump Leaking — Fire Risk (Recall). Power: 286 PS.
GLS (OM656, 2019–2025) — Be Careful: Recall Coolant Pump — Fire Hazard (Action Code 2090008), Bosch CP4 Pump Sensitive to Fuel Quality, Coolant Pump Leaking — Fire Risk (Recall). Power: 330 PS.
GLS (OM656, 2019–2026) — Be Careful: Recall Coolant Pump — Fire Hazard (Action Code 2090008), Bosch CP4 Pump Sensitive to Fuel Quality, Coolant Pump Leaking — Fire Risk (Recall). Power: 340 PS.
GLS (M176, 2019–2025) — Be Careful: Timing Chain Stretch — M176 4.0L V8, Camshaft Adjuster Solenoid Draws Oil into Wiring Harness, Coolant Pump Leaking. Power: 489 PS.
GLS (M256, 2020–2025) — Be Careful: 48V ISG Battery Failure, Camshaft Adjuster Solenoid Leaking — Oil in Wiring Harness, Elevated Oil Consumption at Higher Mileage. Power: 367 PS.
GLS (M177, 2020–2025) — Be Careful: MCT Gearbox — Clutch Wears in City Traffic, Camshaft Adjuster Solenoid Draws Oil into Wiring Harness, Camshaft Cover Gasket Leaking — Hot-V Area. Power: 612 PS.
GLS (M177, 2020–2026) — Be Careful: MCT Gearbox — Clutch Wears in City Traffic, Camshaft Adjuster Solenoid Draws Oil into Wiring Harness, Camshaft Cover Gasket Leaking — Hot-V Area. Power: 489 PS.
GLS (M177, 2020–2025) — Be Careful: MCT Gearbox — Clutch Wears in City Traffic, Camshaft Adjuster Solenoid Draws Oil into Wiring Harness, Camshaft Cover Gasket Leaking — Hot-V Area. Power: 557 PS.
GLS (M177, 2023–2026) — Be Careful: MCT Gearbox — Clutch Wears in City Traffic, Camshaft Adjuster Solenoid Draws Oil into Wiring Harness, Camshaft Cover Gasket Leaking — Hot-V Area. Power: 517 PS.
What to watch out for with the Mercedes-Benz GLS? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the Mercedes-Benz GLS X167 have? +
What should I look for when buying a used Mercedes-Benz GLS X167? +
Which engine is recommended? +
Which Mercedes-Benz GLS X167 engine is the most fun? +
Is the Mercedes-Benz GLS X167 worth buying used? +
What horsepower variants are available for the Mercedes-Benz GLS X167? +
Last updated: February 2026 · All information without guarantee