2021 Mercedes-Benz GLB 220 AMG Line Prem + D 4M A 1.9L Diesel · R88 BAT

With a completely clean two-test MOT history showing no advisories, failures, or even minor defects at either 2024-07-11 or 2025-07-15, this GLB presents an exceptionally tidy roadworthiness profile for a five-year-old vehicle. Both tests passed first time with no recorded items, suggesting that the visible components typically scrutinised under the DVSA test have not yet reached advisory thresholds. The complete absence of brake, suspension, tyre, or corrosion advisories across the most recent two tests is notable for a Mercedes-Benz product of this age, particularly given that many SUVs in this class tend to show early wear on components such as rear brake discs, coil springs, and underbody trim or splash shields. The consistency of clean outcomes back-to-back points to a stable mechanical condition rather than a single isolated pass, and the most recent July 2025 test confirms this has been maintained heading into the current ownership cycle. The recorded mileage of 30,164 miles over a five-year span equates to approximately 6,033 miles annually, which sits squarely in the typical band for a privately used family SUV. This is not a low enough figure to raise concerns about prolonged standing, dried seals, or stale brake fluid from disuse, nor is it high enough to suggest heavy motorway or commercial use that would accelerate wear on clutches, dual-mass components, or particulate filters. The mileage gap between the two recorded tests is consistent with steady, moderate use rather than any sudden accumulation that might indicate a change in usage pattern. Mechanically, this rate of accumulation generally allows original brake pads and discs to still be in service, factory exhaust components to remain intact, and the 2.0-litre diesel engine and 4MATIC drivetrain to be well within their design life without any of the component fatigue that tends to manifest on higher-mileage examples. Given the clean MOT record, a prospective buyer should focus their physical inspection on the areas the test does not cover in depth, particularly because diesel Mercedes-Benz models in this age bracket can develop issues that only become apparent under load or on a test drive. On a road test, listen for any knocking or rattling from the front suspension over uneven surfaces, which would indicate worn lower control arm bushes or anti-roll bar drop links, and feel for any vagueness in steering that might point to worn tie rods or top mount bearings. Check the full-length underside inspection of the vehicle, paying close attention to the subframe mounting points, brake pipes running along the chassis rails, and the rear axle assembly for any early signs of surface corrosion, as Mercedes SUVs of this generation can begin to show cosmetic rust in these areas well before it becomes an MOT failure. It is also worth verifying the operation of the 4MATIC all-wheel-drive system by performing a series of tight turns in a car park and listening for any binding, clunking, or uneven resistance, which could indicate wear in the transfer case or propshaft universal joints. Examine the diesel particulate filter by ensuring the vehicle completes a sustained drive at appropriate operating temperature, as short-trip use over the recorded mileage could lead to incomplete regeneration cycles. Finally, confirm that the infotainment and driver assistance systems operate correctly, that the stop-start system functions as intended, and that the automatic transmission shifts smoothly under light and moderate acceleration, as these electronic and mechanical refinements are areas where the MOT test provides no insight but which are integral to the long-term condition of a premium SUV like the GLB 220.