2021 Mercedes-Benz GLB 200 AMG Line Auto 1.3L Petrol · KO21 FGC

A recurring theme in the MOT record is tyre condition and compliance – the latest test on 16 June 2026 recorded a major failure because the off‑side rear tyre was not fitted in accordance with the side‑wall instructions, while the 2025 test flagged slight damage and cracking on both front tyres. Apart from that single failure, the vehicle has otherwise passed its annual checks, with the 2024 inspection reporting no defects, indicating that the overall roadworthiness trend has been stable apart from the tyre‑related issues. At 27 444 miles after just over five years on the clock, the average annual accumulation is roughly 5 500 miles, which is low for a 2021 GLB. The consistent yearly MOTs suggest the car has been driven regularly rather than sitting idle for long periods, yet the low mileage may mean that consumable wear points such as tyres and brake pads have not been refreshed as often as they would be on a higher‑mileage example. Consequently, age‑related tyre degradation can appear even with modest mileage, and the thin front brake pads noted in 2025 are consistent with a vehicle that has not accumulated many miles but may have been driven hard in short bursts. Prospective buyers should give the tyre set a thorough visual and tactile inspection. Look for side‑wall cracks, bulges, or any signs of delamination, and confirm that the tyre size and load rating match the manufacturer’s specification. During a test drive, feel for any vibration at speeds above 50 mph, which can indicate internal tyre damage, and check that the steering remains straight without pull, suggesting the wheels are correctly mounted and balanced. Because the off‑side rear tyre was previously deemed non‑compliant, verify that the wheel nuts are torqued to the correct specification and that the valve stems are intact and correctly seated. The front brake pad advisory from 2025 means the pads are likely approaching the minimum thickness and may need replacement soon. On a drive, listen for any squeal or grinding when applying the brakes, and feel for a soft or spongy pedal, which would point to worn pads or possible disc wear. While no suspension or structural defects have been recorded, a low‑mileage vehicle can still develop bush wear or corrosion, especially if it has spent periods stationary. Inspect the suspension bushes for any play, listen for clunks over bumps, and ensure the steering feels precise without excessive play. Addressing the tyre and brake concerns now will help maintain the vehicle’s roadworthiness and avoid unexpected failures.