2013 — 2018
3.0L OM642 DE30 LA V6 (140kW)
Diesel
Check this by inspecting the engine bay cold for signs of 'black death' around the fuel injectors. | Note: Look for carbon buildup or a 'chuffing' sound while idling, which is a known characteristic of the OM642 injectors needing resealing over time.
While driving, monitor the transmission for any hesitant gear changes or flares during light acceleration. | Note: The 5-speed automatic in these models appreciates smooth shifts; if it feels jerky, it may be worth checking the condition of the transmission fluid and conductor plate.
Check this by accelerating briskly on an incline to listen for any high-pitched whistling or loss of boost. | Note: Rubber turbo hoses on the OM642 can degrade or split due to engine heat, which is common in older commercial diesel vans.
While parked with the engine running, carefully inspect the underside for any oil seepage from the oil cooler seals. | Note: This is a well-known area where seals can harden with age, often requiring a bit of labor to address.
Usually the time to evaluate the health of the DPF (Diesel Particulate Filter) and glow plug control module.
A common point to refresh the water pump, thermostat, and inspect the condition of the serpentine belt and tensioner assembly.
Consider having the turbocharger's actuator and vacuum lines inspected for optimal boost response.
Prioritize oil changes every 10,000-15,000km using high-quality MB-approved 229.51/52 spec oil to keep the V6 running smoothly.
Keep a close eye on the transmission fluid level and quality, as fresh fluid helps maintain the longevity of the valve body.
Regularly clear out the cabin air intake plenum to prevent debris buildup and ensure the heater blower motor stays in good condition.
Check the condition of the tailshaft center bearing, as regular heavy-duty use can lead to vibration over time.
Ensure the DPF system has a chance to perform a regeneration cycle by taking it for an occasional longer highway drive if it’s mostly used for short city trips.
Estimated repair costs if issues arise
Because the oil cooler is buried deep in the 'V' of the engine, it is a labor-intensive job. If you notice persistent oil leaks in the engine valley, you should eventually budget for this professional service.
Depending on the van's previous life and idling habits, the DPF may eventually reach its ash-loading limit. It is good practice to budget for a professional clean or eventual replacement to keep emissions systems healthy.
Should you notice the tell-tale black carbon deposit on top of an injector, it is best to reseal them promptly to prevent damage to the cylinder head. Planning for this allows you to address all injectors at once for peace of mind.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer