MERCEDES-BENZ GL 320 2009 · 3.0L Diesel

The 2009 Mercedes-Benz GL 320 presents a stable and sound mechanical history, culminating in a clean pass at 113,127 miles on 15 April 2025. The maintenance trend remains consistently positive, with the most recent test recording zero defects. A failed test occurred on 3 April 2024 at 110,788 miles, yet the record shows no specific defects listed for that failure, suggesting an administrative issue or a rectified minor fault that did not warrant a formal advisory. The vehicle passed its retest just two days later on 5 April 2024 with no defects, indicating any underlying concern was promptly addressed. The annual mileage accumulation sits at a typical 6,655 miles per year for a vehicle of this age. However, the recent usage pattern reveals a notable slowdown. Between April 2021 and April 2023, the GL covered 10,994 miles, yet the subsequent two years saw a sharp drop to just 2,375 and 2,339 miles respectively. This reduced recent usage often correlates with prolonged periods of standing, which can cause brake disc corrosion, tyre flat spots, and deteriorating rubber suspension bushes. The missing 2022 test creates a slight gap in the chronology, though the 2023 pass confirms the vehicle remained roadworthy through that period. Given the low recent mileage and the absence of recurring mechanical advisories, a buyer should focus on age-related degradation rather than chronic mechanical failure. Inspect the suspension bushes and coil springs for perishing, a common issue on large SUVs that spend time stationary. Check the brake discs for surface corrosion and verify that the calipers are not binding, as low-mileage driving prevents the pads from wiping the discs clean. Examine the tyre sidewalls for cracking, as the rubber ages regardless of tread depth. The underbody and structural mounts require a thorough inspection for corrosion, ensuring the structural integrity of this heavy-duty chassis remains uncompromised.