2013 Mercedes-Benz B-Class 1.8L Diesel · KL54 AAS

A single rear brake imbalance and associated pad wear is the only recorded mechanical concern across five years of testing, with the 2025-04-02 failure and advisory being fully resolved before the same vehicle subsequently passed a clean retest on the same day. The 2026-04-08 pass with no advisories, combined with three consecutive clean passes at 2023-04-13, 2024-04-23 and 2025-04-02, demonstrates a stable roadworthiness profile and no pattern of recurring advisories or progressive deterioration. The lone flagged items relate to the rear braking system specifically, and there is no recorded history of suspension, steering, exhaust, corrosion or structural advisories, which is a positive indicator for a B-Class of this age where rear subframe and trailing arm corrosion can otherwise surface. The recorded mileage of 68,319 miles across a thirteen-year lifespan equates to an average accumulation of roughly 5,255 miles per year, which is well below the typical mileage for a vehicle of this vintage. The MOT records show annual tests in 2023, 2024 and 2025 with consistent year-on-year attendance and no multi-year testing gaps, confirming the vehicle has remained in active use rather than laid up. Mechanically, this lower-than-average usage reduces wear on high-mileage consumables such as clutch, timing chain, turbo components and drivetrain mounts, but it does mean greater attention is warranted to items that suffer from prolonged stationary periods, including brake caliper seizure from infrequent operation and corrosion on seized-on brake pads. Given the rear brake imbalance and thin rear pads flagged in 2025, any prospective buyer should focus the physical inspection on the rear calipers, pad slides and handbrake mechanism. On the test drive, listen for any scraping or grinding from the rear wheels, particularly when first applying the brakes from cold, and check for a binding sensation or pull to one side under light braking, which would indicate a caliper that has partially seized after the pad replacement. The handbrake should hold firmly on a modest incline without excessive travel, as a slack handbrake lever can point to worn rear shoes or a stretched cable rather than the discs and pads. Additionally, with rear pads previously flagged as thin, inspect the inner and outer pad edges through the wheel spokes for even wear across both sides, as uneven wear between the inboard and outboard pads suggests a stuck caliper piston or guide pin. Beyond the braking system, a test drive on varied surfaces is worthwhile given the low annual mileage. Listen for any clonks or knocks from the rear suspension over speed humps and uneven tarmac, paying particular attention to the rear trailing arm bushes and coil springs, as Mercedes B-Class models of this generation are known to develop rear suspension knocking as the bushes harden with age. Steering should remain centred and free of vibration at motorway speeds, and the automatic gearbox should shift smoothly without hesitation or flare between gears. Finally, a thorough underbody inspection or hoist check is advisable to confirm there is no surface corrosion beginning on the rear axle, brake pipes or undertray, even though the MOT history has not yet recorded any such advisories.