Summary

• With 1,035 currently listed for sale and an average price of $24,204.00, 34.8% of 2021 Mercedes-Benz GLBs for sale on CarGurus are rated as good or great deals.

• Favorably reviewed: Owners rated the 2021 Mercedes-Benz GLB 5 / 5 stars.

• 84.9% of 2021 GLB models on CarGurus are accident free.

• The 2021 Mercedes-Benz GLB-Class stands out with its optional third row of seating, increasing passenger capacity and versatility, making it an attractive choice in the luxury SUV market.

Why it stands out

The 2021 Mercedes-Benz GLB emerges as a highly versatile choice in the compact luxury SUV segment, skillfully blending practical passenger space with the brand's hallmark sophistication. With a starting price well within reach for a luxury vehicle, it offers an optional third row of seats that can accommodate up to seven passengers—an unusual feature in this class, enhancing its family-friendly appeal. The GLB is equipped with a turbocharged 2.0-liter four-cylinder engine, delivering a respectable 221 horsepower and a user-friendly eight-speed dual-clutch automatic transmission.

Its commendable expert rating of 8/10 reflects its attractive aesthetics and tech-savvy features, such as the MBUX infotainment system with voice activation. Owner reviews highlight its spacious interior and technology, although some criticism is directed at its third-row seating, which may feel cramped for taller passengers. Furthermore, the GLB combines practicality with style, making it a solid option for buyers looking for luxury without exorbitant costs.

Other model years to consider

• 2022 Mercedes-Benz GLB

  • Average price: $28,066.00
  • Good/great deal percentage: 37.5%
  • User rating: 4 / 5
  • Total listings: 1,308

• 2020 Mercedes-Benz GLB

  • Average price: $21,503.00
  • Good/great deal percentage: 32.4%
  • User rating: 4.14 / 5
  • Total listings: 525

This analysis is based on CarGurus' proprietary market data from June 29, 2026, CarGurus experts' opinions, and generative AI.