1991 MERCEDES Unknown4.0L HEAVY OIL

The roadworthiness status of this Mercedes is currently non-compliant due to consecutive test failures, indicating a worsening trend that demands immediate mechanical investigation. In the September 2025 test at 190,506 miles, the vehicle failed just weeks after another failure in September 2005 at 189,122 miles. The absence of specific defect descriptions in the digital record means the exact cause of these test refusals cannot be verified from the data alone, though the vehicle has covered a minimal 1,384 miles between those two September inspections. The recorded mileage of 190,506 miles across an age of approximately thirty-five years yields an average of roughly 5,443 miles per year, representing low overall usage. The MOT dataset provided for this vehicle is exceptionally sparse, restricted entirely to the two consecutive failures recorded in September 2025. This lack of historical data prior to late 2025 leaves a significant blind spot regarding how previous owners maintained the chassis, drivetrain, and structural integrity during the car's early decades. A physical inspection must focus heavily on areas prone to deterioration on older Mercedes platforms, specifically structural corrosion in the chassis members, sill areas, and suspension mounting points. Potential buyers should thoroughly examine the brake lines, discs, and calipers for seizure or fluid leaks, alongside rubber suspension bushes and coil springs that degrade over decades regardless of low mileage accumulation. Verifying the root cause of the recent double MOT failure is essential before committing to a purchase, as the vehicle cannot be driven legally on the public highway until all unknown defects are rectified and a fresh pass certificate is secured.