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2025 Mercedes-Benz GLS450 review

Research, photos, specs, and expertise

Mercedes-Benz GLS450 highlights

Customer rating

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RepairPal reliability rating

RepairPal Reliability Ratings are based on the actual cost, frequency, and severity of unscheduled repairs and maintenance on make/model data for select 2008-2022 vehicles. The reliability of a specific vehicle may vary depending on its maintenance and driving history, model year, trim, and features. RepairPal Reliability Ratings are provided by RepairPal and CarMax is not responsible for their accuracy. These ratings are based on RepairPal Reliability data as of August 2023. Learn more about RepairPal reliability ratings

Mileage (EPA estimate)

19 city, 24 highway, 21 combined

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Ratings & reliability

Customer ratings

The 2025 Mercedes-Benz GLS450 is not yet rated. Help future customers learn about a car you've owned and write a review.

RepairPal reliability rating

RepairPal Reliability Ratings are based on the actual cost, frequency, and severity of unscheduled repairs and maintenance on make/model data for select 2008-2022 vehicles. The reliability of a specific vehicle may vary depending on its maintenance and driving history, model year, trim, and features. RepairPal Reliability Ratings are provided by RepairPal and CarMax is not responsible for their accuracy. These ratings are based on RepairPal Reliability data as of August 2023. Learn more about RepairPal reliability ratings

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Above Average

RepairPal gave the Mercedes-Benz GLS450 an overall reliability rating of 3.5 out of 5 stars, which RepairPal describes as Above Average. This rating ranks Mercedes-Benz GLS450 5th out of 20 among Luxury Fullsize SUVs.

Cost

According to RepairPal, cost is the average total annual cost for unscheduled repairs and maintenance across all model years of a vehicle. Higher average cost alone does not necessarily mean a vehicle is less reliable.

The related cost of a specific vehicle may vary depending on its maintenance and driving history, model year, trim, and features. RepairPal ratings are provided by RepairPal and CarMax is not responsible for the accuracy. These ratings are based on RepairPal Reliability data for select August 2023 vehicles as of August 2023. Learn more about RepairPal reliability ratings

RepairPal reports that the average total annual cost for repairs and maintenance on a Mercedes-Benz GLS450 is $937, compared to an average of $779 for Luxury Fullsize SUVs and $591 for all the vehicles RepairPal considered in its dataset.

Frequency

According to RepairPal, frequency is the average number of times the vehicle is brought into the shop for unscheduled repairs and maintenance in a single year. RepairPal reports that it calculates this metric by tracking millions of unique vehicles over multiple years to determine an average number of visits per year for each make and model; and that controls are included to omit small routine visits to shops (such as for oil changes).

The frequency of such visits for a specific vehicle may vary depending on its maintenance and driving history, model year, trim, and features. RepairPal ratings are provided by RepairPal and CarMax is not responsible for the accuracy. These ratings are based on RepairPal Reliability data for select August 2023 vehicles as of August 2023. Learn more about RepairPal reliability ratings

According to RepairPal, Mercedes-Benz GLS450 owners bring their vehicles into a repair shop for unscheduled repairs an average of 0.6 times per year, compared to an average of 1.8 times for Luxury Fullsize SUVs and 1.3 times for all the vehicles RepairPal considered in its dataset.

Severity

According to RepairPal, severity measures the probability that a repair will be a major issue. RepairPal reports that an issue is considered severe if a repair costs three-times the average annual repair cost for all models. This threshold will be higher for vehicles that have higher labor rates and parts costs (such as a premium brand).

The severity of repairs for a specific vehicle may vary depending on its maintenance and driving history, model year, trim, and features. RepairPal ratings are provided by RepairPal and CarMax is not responsible for the accuracy. These ratings are based on RepairPal Reliability data for select August 2023 vehicles as of August 2023. Learn more about RepairPal reliability ratings

RepairPal reported that the probability of a repair being a severe or major issue is 15% for the Mercedes-Benz GLS450, compared to an average of 17% for Luxury Fullsize SUVs and 14% for all the vehicles RepairPal considered in its dataset.

2025 Mercedes-Benz GLS450 FAQ

Mercedes-Benz GLS450 articles

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