Repair Procedures

Workshop-style remove-and-install procedure for the OM642 exhaust gas recirculation positioner (Y27/11) on the NCV3 Sprinter Model 906. Covers coolant pressure relief, hose clamp-off, EGR positioner removal, sealing-ring replacement, the 8 Nm valve-to-housing torque spec, and the post-install leak test.

Workshop-style remove-and-install procedure for the main fuel filter on Mercedes-Benz OM651 four-cylinder diesel engines fitted to the NCV3 Sprinter (Model 906) and late T1N (Model 900). Covers click-clamp removal, condensation-sensor handling, the installation arrow, and the leak-test run.

Replace the electric EGR valve on the OM646 four-cylinder NCV3 Sprinter. Covers coolant draining, intake-pipe removal, the four EGR-valve bolts, the new gasket and O-ring, the cooler-to-valve seal, electrical reconnection, and the post-install adaptation reset.

Step-by-step tire rotation procedure for the NCV3 Sprinter to maximize tire life and ensure even wear, including 2WD, 4WD dual-rear-wheel (DRW), and 4x4 patterns.

Bleed and flush the brake hydraulic system on the NCV3 Sprinter every 2 years to remove moisture-contaminated fluid that lowers boiling point and corrodes ABS components.

Replace the in-frame diesel fuel filter on the OM642 to prevent injector wear, improve cold-start behavior, and keep the high-pressure fuel system clean. Includes priming and air-bleed steps.

Replace the engine air filter on the OM642 NCV3 Sprinter to protect the turbocharger, restore power, and improve fuel economy.

Drain, filter, and refill the 5G or 7G-Tronic automatic transmission on the OM642 NCV3 Sprinter. Service every 60,000 miles to prevent costly failures.

Inspect the NCV3 rear leaf-spring suspension for sagging springs, worn shackles, dead shocks, and shifted u-bolts.

Replace the AGM starter battery on the OM642 NCV3 Sprinter under the driver seat. Critical SAM coding step required.

Replace the OM642 water pump - a known failure point at 80,000-150,000 miles.

Replace all 6 glow plugs and the glow plug control module (GPCM) on the OM642 3.0L V6 CDI. Failing glow plugs cause hard cold starts, white smoke on startup, and misfires. Always replace as a full set - never individual plugs.

Service the NAG-1 / NV241 transfer case on 4x4-equipped OM642 NCV3 Sprinters. Drain and refill ATF every 30,000 miles.

Drain and refill the front axle differential on 4x4 OM642 NCV3 Sprinters. Often-skipped service that prevents pinion bearing failure.

Replace the 220A alternator on the OM642 NCV3 Sprinter when the original fails.

Quick step-by-step replacement of the cabin air filter on the NCV3 Sprinter to restore HVAC airflow and reduce cabin dust, pollen, and odors.

Drain and refill the rear differential gear oil on the OM642 NCV3 Sprinter to prevent ring and pinion wear. Service every 30,000 miles.

Workshop-style 34-step remove-and-install procedure for the OM651 exhaust gas recirculation positioner (Y27/15) with bypass flap on Sprinter Model 900 and NCV3 Model 906. Covers coolant drain, EGR cooler and charge-air-distributor removal for access, fuel-hose disconnection at the high-pressure pump, the ZU7/ZU8 USA/Canada shield variant, and all torque specs.

Replace the serpentine belt on the OM642 NCV3 Sprinter to prevent unexpected breakage that can leave you stranded.

Comprehensive inspection of the NCV3 front suspension - control arms, ball joints, sway-bar links, struts - plus service and replacement triggers.

Replace the engine-mounted spin-on fuel filter on the OM646 four-cylinder NCV3 Sprinter. Different housing, different procedure, and a different prime sequence than the OM642 V6 — get it wrong and the high-pressure pump can pull air and fail to start.

Step-by-step guide for changing the engine oil and filter on Mercedes OM642 BlueTEC diesel engines found in 2007-2018 Sprinters.

How to replace front brake pads on Mercedes Sprinter vans. Covers T1N and NCV3 platforms.