2017 Mercedes-Benz GLA 2.1L Diesel · WF17 OLG

A recurring weakness in the drivetrain is evident, with major CV‑joint boot failures recorded on both drive‑shaft sides – the nearside outer joint in March 2023 and the off‑side joint in March 2026 – each flagged as a safety‑critical defect that prevented the boot from sealing against dirt ingress. The most recent MOT on 23 March 2026 confirmed the vehicle now passes, but the same test also noted the nearside front tyre edging close to the legal tread limit, highlighting that tyre wear is approaching a replacement point while the CV‑joint issue has been rectified. At just 46,871 miles after nine years, the average annual accumulation sits around 5,200 mi, well below typical usage for a compact SUV of this age. Such low mileage often implies periods of limited use or extended storage, which can accelerate the ageing of elastomeric components such as CV‑joint boots and tyre sidewalls. The consistent yearly MOT schedule, with no gaps longer than a year, suggests the vehicle has been regularly inspected, yet the low mileage does not preclude wear on suspension bushes, bushings and rubber seals that are sensitive to time as well as distance. Prospective buyers should give the drive‑shaft boots a thorough visual inspection for any signs of cracking, hardening or fresh grease leakage, and listen for a characteristic clicking or clunking noise when turning the steering wheel at low speed – classic symptoms of a deteriorating CV joint. The front tyres should be measured for tread depth across the width; with the nearside tyre already near the legal limit, replacement of both front tyres is advisable to maintain balanced grip and avoid uneven wear. A test‑drive should include steady‑state cruising and gentle acceleration to feel for any vibration or judder that could indicate residual joint play or early bearing wear. Finally, budgeting for a new set of front tyres and a potential CV‑joint boot refurbishment (or full joint replacement if internal damage is present) will be prudent, as these items are directly linked to the recorded failures. An independent mechanical inspection that checks the condition of the drive‑shaft boots, surrounding dust‑covers and the integrity of the suspension bushings will provide a clearer picture of any latent issues that may not have surfaced in the MOT tests yet.