Summary

• With 1,040 currently listed for sale and an average price of $24,384.00, 34.1% 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.

• 85.1% of 2021 GLB models on CarGurus are accident free.

• The 2021 Mercedes-Benz GLB introduces versatile seating arrangements, including an optional third row for added passenger capacity and a host of modern technology features.

Why it stands out

The 2021 Mercedes-Benz GLB stands out in the luxury SUV market with its compact yet spacious design and flexibility for families. Its optional third row of seating increases passenger capacity, making it a unique choice among compact SUVs. The GLB also incorporates cutting-edge technology, such as the MBUX infotainment system with natural language understanding, boasting an attractive interior and high-quality materials that exude luxury. The SUV is powered by a turbocharged 2.0-liter inline four-cylinder engine, providing a respectable balance of power and fuel efficiency. With an impressive accident-free rate of 85.1%, buyers can enjoy peace of mind on the road. Although some may find the third row cramped for adults, the GLB's overall combination of space, comfort, and advanced safety features makes it a worthy contender for those looking to join the Mercedes-Benz family.

Other model years to consider

• 2022 Mercedes-Benz GLB

  • Average price: $28,451.00
  • Good/great deal percentage: 34.2%
  • User rating: 4 / 5
  • Total listings: 1,247

• 2020 Mercedes-Benz GLB

  • Average price: $21,637.00
  • Good/great deal percentage: 31.8%
  • User rating: 4.14 / 5
  • Total listings: 548

This analysis is based on CarGurus' proprietary market data from May 4, 2026, CarGurus experts' opinions, and generative AI.