2018 Mercedes-Benz Sprinter 2.1L Diesel · BU68 KWN

A chronic steering rack inner joint wear pattern defines the mechanical story of this 2018 Mercedes-Benz Sprinter, with advisories for play at both nearside and offside front inner joints recurring across the 2023, 2024, and 2026 MOT tests. While each annual test has ultimately resulted in a pass, the persistence of the same advisory over multiple consecutive inspections suggests a progressive deterioration rather than a one-off finding, indicating that the steering rack assembly is approaching the threshold where replacement becomes necessary rather than merely advisory. The April 2026 test passed with the same front steering rack inner joint advisory still recorded, confirming the wear is ongoing rather than resolved, and a prospective buyer should treat this as an active maintenance liability likely to escalate into a failure within the next one to two test cycles. The April 2023 failure for a cut tyre exceeding ply depth, an inoperative rear fog lamp, and parking brake efficiency below requirements appears to have been rectified promptly given the pass just eight days later, but the parking brake shortfall is particularly relevant on a heavy commercial platform of this nature. With 235,670 miles recorded over approximately eight years of service, this Sprinter has accumulated around 29,500 miles annually, a figure well in excess of typical private car usage and consistent with sustained commercial or fleet operation. There are no extended gaps in the MOT testing history to suggest long periods off the road, which means the major mechanical assemblies have been in continuous service under load. At this mileage, the wear curves for suspension bushes, brake discs and pads, clutch components (if manual), and turbocharger-related items on the diesel engine will all be advanced. The combination of high annual mileage and the recurring steering advisories points to a chassis that has done substantial work, and the drivetrain, particularly the dual-mass flywheel if equipped, clutch, and gearbox synchros, warrants close inspection as these are high-cost items on a Sprinter of this vintage and mileage. For a buyer, the priority inspection areas should centre on the steering system, starting with a low-speed lock-to-lock test on a dry surface to detect any clonking, slack, or uneven resistance through the steering wheel, which would confirm worn inner track rod or rack joints beyond advisory tolerance. Listen for any knocking or rattling from the front suspension over uneven roads, as the inner joint play can mask or coincide with worn anti-roll bar drop links, control arm bushes, and top mounts, all common wear items on high-mileage Sprinters. Conduct a firm test of the parking brake on an incline, as the 2023 failure for parking brake efficiency suggests the rear caliper mechanism, cables, or handbrake shoes may still be marginal, and any tendency for the vehicle to creep or require excessive lever travel should be treated as a likely imminent rectification cost. On the test drive, pay particular attention to brake pedal feel, looking for any sponginess that could indicate caliper binding or flexible hose deterioration, and check for pulling to one side under braking which on a heavily loaded van is a common symptom of unevenly worn discs or a seizing caliper guide pin. Inspect the tyres closely for uneven shoulder wear, which on a rear-wheel drive commercial vehicle of this mileage often points to misalignment, worn rear leaf spring bushes, or sagging rear springs, all of which carry significant replacement costs. Finally, examine the underside for any oil misting from the diesel engine and gearbox, and check the steering rack gaiters for splits or grease loss, as a failed gaiter would explain the inner joint play advisories accelerating into a more serious structural failure of the rack itself. Given the mileage and the persistent steering wear pattern, budgeting for a steering rack replacement within the next 12 to 18 months would be a prudent position for any prospective buyer.