Summary

• With 165 currently listed for sale near Saint Louis, MO and an average price of $68,199.00, 30.3% of 2023 Mercedes-Benz GLSs for sale on CarGurus are rated as good or great deals.

• 96.4% of 2023 GLS models on CarGurus are accident free.

Why it stands out

The 2023 Mercedes-Benz GLS stands out as the roomiest vehicle in the Mercedes-Benz lineup, with three rows of seating for six or seven people and up to 94 cubic feet of cargo space. It is also positioned as a midsize SUV that blends the comfort and space of the S-Class luxury sedan with a modicum of off-road capability from the G-Class. That combination gives it a clear identity: it is a large, family-focused luxury SUV that still carries Mercedes-Benz’s emphasis on refinement.

For 2023, the GLS450 gained a panoramic moonroof and metallic paint as standard equipment. The broader second-generation GLS also brought a more curvy exterior design and a wide-screened, tech-forward cabin, along with more comfort and safety features. Standard equipment included dual 12.3-inch displays with MBUX, navigation, a Burmester surround sound stereo, SiriusXM, nine USB-C ports, wireless charging, heated front seats, MB-Tex upholstery, a sunroof, power-folding third-row seats, power-adjustable second-row seats, and 19-inch wheels. The GLS450’s 48-volt mild hybrid system, called EQ Boost, was designed to reduce fuel consumption, enable faster and smoother engine restarts, and provide electric torque from a standstill, while fuel economy improved to an EPA-estimated 21 mpg combined.

The 2023 GLS is appealing because it delivers a lot of luxury and practicality in one package, and the available seating flexibility is especially useful for families. At the same time, it is not without compromises: the second-generation GLS lost some cargo space compared with the previous version, and the buying guide notes that third-row seat access and touch-sensing controls are drawbacks. Even so, its combination of space, comfort, and standard technology makes it a distinctive choice among three-row luxury SUVs.

Other model years to consider

• 2024 Mercedes-Benz GLS

  • Average price: $66,899.00
  • Good/great deal percentage: 25.1%
  • User rating: 5 / 5
  • Total listings: 195

• 2018 Mercedes-Benz GLS

  • Average price: $22,022.00
  • Good/great deal percentage: 35.6%
  • User rating: 4.8 / 5
  • Total listings: 180

• 2020 Mercedes-Benz GLS

  • Average price: $36,590.00
  • Good/great deal percentage: 28.1%
  • User rating: 5 / 5
  • Total listings: 153

This analysis is based on CarGurus' proprietary market data from August 11, 2026, CarGurus experts' opinions, and generative AI.