Summary

• With 67 currently listed for sale near Seattle, WA and an average price of $25,097.00, 73.1% 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.

• 100.0% of 2021 GLB models on CarGurus are accident free.

• The 2021 Mercedes-Benz GLB-Class offers an optional third row of seating, enhancing its versatility as a compact luxury SUV.

Why it stands out

The 2021 Mercedes-Benz GLB-Class distinguishes itself in the luxury SUV market with its flexible interior layout and optional third-row seating, accommodating up to seven passengers. This feature, combined with its approachable starting price, makes it an attractive option for families seeking a premium vehicle without the hefty price tag. The GLB is powered by a turbocharged 2.0-liter inline four-cylinder engine, delivering 221 horsepower and paired with an eight-speed dual-clutch automatic transmission, ensuring a smooth driving experience. Its modern interior boasts high-quality materials and advanced technology, including the latest MBUX infotainment system, which enhances user interaction with voice commands. While the third row may feel cramped for adults, it is suitable for children, making the GLB a practical choice for family outings. Overall, the GLB balances luxury, performance, and functionality, appealing to buyers looking for a well-rounded compact SUV.

Other model years to consider

• 2022 Mercedes-Benz GLB

  • Average price: $30,941.00
  • Good/great deal percentage: 92.1%
  • User rating: 4 / 5
  • Total listings: 76

• 2020 Mercedes-Benz GLB

  • Average price: $22,143.00
  • Good/great deal percentage: 32.6%
  • User rating: 4.14 / 5
  • Total listings: 43

This analysis is based on CarGurus' proprietary market data from July 14, 2026, CarGurus experts' opinions, and generative AI.