2017 Mercedes-Benz Sprinter 2.1L Diesel · WM66 RNN

A Sprinter of this vintage carrying 149,227 miles presents a working-vehicle profile rather than a leisure-use one, and the DVSA history supports that interpretation. The most recent test on 9 October 2025 returned a clean pass with no advisories or defects recorded, matching the previous pass of 1 October 2024 and the earlier pass of 12 October 2023. The two intermediate failures dated 27 September 2024 and 11 October 2023 carry no recorded defect descriptions on the DVSA system, which suggests both were likely rectified off-site before the subsequent re-tests within days or weeks. For a commercial platform chassis, the absence of any recurring advisories for suspension components, brake pipes, subframe corrosion, or exhaust integrity across three successful tests is a notably positive signal of structural and mechanical soundness at the test points, particularly given the high workload this vehicle appears to have endured. Annual mileage of roughly 16,581 miles is well above the average for a nine-year-old vehicle and is consistent with sustained commercial or fleet deployment, the type of duty cycle that places continuous load on drivetrain, braking, and underbody components. There are no extended gaps in the testing record that would indicate long periods off the road, which means wear accumulation has been steady rather than punctuated by standing time, itself a factor that can accelerate corrosion on brake discs, hubs, and underbody steel. Despite the heavy annual usage, the absence of recorded advisories for items typically worn by high-mileage vans, such as front brake disc lipping, rear brake component condition, suspension bush deterioration, or exhaust corrosion, suggests that consumable replacement has been carried out proactively between tests. The mileage progression between test dates is broadly linear, which is the expected pattern for a working van rather than one that has been clocked or subjected to irregular use. For a prospective buyer, the principal inspection focus on a test drive should be the symptoms associated with high-mileage Sprinter chassis and drivetrains, even though none have yet been flagged at test. Listen for clonks or knocks from the front suspension over uneven surfaces, particularly indicative of worn lower control arm bushes, anti-roll bar drop links, or top mount bearings, all known wear points on this platform. On the move, evaluate steering precision; any vagueness, tram lining on cambers, or pulling to one side under braking would warrant checks for worn front suspension components or unevenly worn front discs and pads. Pay attention to brake pedal feel for sponginess, suggesting aged fluid or rear brake adjustment issues, and feel for vibration through the pedal under firm braking that would suggest disc lipping or hot spots. Given the absence of any corrosion advisories across multiple tests, inspect the underbody thoroughly with a torch and, if possible, from beneath on a ramp. Sprinter rear axle assemblies, handbrake mechanisms, and chassis outriggers are common corrosion sites on high-mileage examples of this era, so a careful check of the rear chassis rails, brake pipes along their full length, and the subframe mounting points is worthwhile. On start-up from cold, listen for any timing chain rattle or diesel injector tick characteristic of high-mileage OM651 units, observe the exhaust for blue smoke on overrun indicating turbo seal or piston ring wear, and check the engine oil on the dipstick for any milky residue suggesting head gasket concerns. A fluid service history substantiating regular oil and filter changes at shortened intervals would be valuable corroborating evidence given the workload this vehicle has clearly sustained.