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Reliability Database
Mercedes-Benz

GLS-Class

Full-Size SUV
Best Engine ✅ Recommended (4.0)
2 Generations
9 Engines Rated
176 Total Complaints
Engine Ratings
5 recommended 2 caution 2 avoid

Generation Timeline

2013-2019 X166
5 engines
85 complaints 🔥 11
4.7L 8-cyl ✅ Recommended (4.0)
→
2020-2025 X167
4 engines
91 complaints 🔥 3
3.0L Turbo 6-cyl ❌ Avoid (1.7)
→
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