Used 2021 Mercedes-Benz GLB for Sale near San Diego, CA

## Summary - With 1,101 currently listed for sale on CarGurus and an **average price of $24,485.00**, 36.1% 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 4.83 / 5 stars and CarGurus experts gave it an 8 / 10. - **84.2% of 2021 GLB models on CarGurus are accident free**. - The 2021 Mercedes-Benz GLB-Class makes its mark by offering an optional third row of seating, bringing its passenger capacity from five to seven, thereby enhancing its versatility as a family vehicle. ## Why it stands out The 2021 Mercedes-Benz GLB stands out in the crowded luxury SUV market due to its balance of functionality and sophisticated style. This model year introduces a unique option for a third row of seating, significantly expanding its capacity for passengers and cargo, which is a notable improvement over many competitors. With a turbocharged 2.0-liter engine producing 221 horsepower and impressive fuel economy ratings of up to 30 mpg on the highway, it offers a good blend of performance and efficiency. The GLB's modern, well-crafted interior features advanced technology including the MBUX infotainment system and a sleek digital instrument cluster. However, potential buyers should consider the cramped third row and some user-reported discomfort in the seats. Overall, the 2021 Mercedes-Benz GLB appeal lies in its luxury features and spaciousness, making it a compelling choice for those looking to step into the premium SUV segment without breaking the bank. ## Other model years to consider - **[2023 Mercedes-Benz GLB](https://www.cargurus.com/Cars/l-Used-2023-Mercedes-Benz-GLB-c32605)** - Average price: $30,686.00 - Good/great deal percentage: 31.2% - User rating: 5 / 5 - Total listings: 1,041 - **[2022 Mercedes-Benz GLB](https://www.cargurus.com/Cars/l-Used-2022-Mercedes-Benz-GLB-c31985)** - Average price: $27,833.00 - Good/great deal percentage: 34.4% - User rating: 4.75 / 5 - Total listings: 1,212 - **[2020 Mercedes-Benz GLB](https://www.cargurus.com/Cars/l-Used-2020-Mercedes-Benz-GLB-c29345)** - Average price: $21,159.00 - Good/great deal percentage: 40.0% - User rating: 4.06 / 5 - Total listings: 633 This analysis is based on CarGurus' proprietary market data from February 10, 2026, CarGurus experts' opinions, and generative AI.