2020 Mercedes-Benz A 2.0L Petrol · A20 LBK

The most recent MOT on 6 March 2026 recorded a pass, but it was preceded by a dangerous failure for front‑brake pads measured at 1.1 mm, below the 1.5 mm minimum. The failure was rectified that same day, allowing the vehicle to pass. Over the previous three years the MOT sheets have shown a recurring advisory on the front brake disc and pads, indicating progressive wear but no outright safety‑critical defects. The pattern suggests a gradual deterioration of the front braking system that has been managed by timely replacement, rather than an abrupt decline, so the maintenance trend is cautiously stable provided the current pads and discs are replaced promptly. At six years old the car has logged only 31,549 miles, an average of roughly 5,250 miles per annum, which is well below the typical UK usage of 8‑10 000 miles a year. Such low annual mileage often points to periods of limited use or extended storage, which can be as consequential as high mileage. Prolonged standing can encourage moisture ingress, corrosion of suspension joints and brake components, and the gradual perishing of rubber compounds. The modest mileage therefore does not automatically guarantee low wear; attention must be given to age‑related degradation rather than mileage‑related fatigue. A prospective buyer should give the front braking system the most thorough examination. Verify that the new pads are at least 3 mm thick and that the rotors are free of deep scoring, excessive pitting or warping; any pulsation through the pedal, squeal on light application or a noticeable shudder when braking from speed are classic symptoms of worn or uneven discs. Inspect the caliper pistons for smooth operation and check for any brake fluid leakage around the master cylinder and hose connections. While the MOT advisory noted the inner disc was previously worn, confirm that both sides of the rotor now present a uniform surface and that the brake fluid has been changed within the last 24 months, as moisture absorption can reduce boiling point and compromise performance. Given the vehicle’s age and low‑use profile, also examine the tyre sidewalls for cracking, hardening or dry‑rot, especially on the spare if it has been stored for long periods. Assess the 12‑volt battery for charge hold and terminal corrosion, and consider a load test as batteries over five years can lose capacity even with few miles. Look beneath the chassis for any signs of under‑carriage rust, particularly around the rear suspension mounts and exhaust hangers, and check that the suspension bushes and coil springs are free of corrosion and retain their original compliance. Finally, confirm that the service book shows timely oil, coolant and filter changes on a calendar basis, as fluids degrade with time as much as with mileage, and that any outstanding brake work noted in the MOT has been fully rectified before committing to purchase.