2000 — 2005
2.9L (OM602) - Diesel Classic
Diesel
Observe the transmission shifting when cold; it is common for the older automatic gearboxes in these Musso units to exhibit slightly lazy shifts, so pay attention to any harsh engagement.
Engage the 4WD system on a loose surface to ensure the vacuum-actuated front hubs engage smoothly, as these can sometimes become sluggish if they haven't been cycled regularly.
Listen closely to the engine idle; the 2.9L OM602 is legendary for reliability, but checking for excessive rattling or uneven pulses is a good way to gauge if the injectors might eventually need professional calibration.
Check the temperature gauge during a longer drive; with vehicles of this vintage, it is a sensible precaution to ensure the cooling system is performing optimally to prevent long-term stress on the head gasket.
Usually when the suspension bushings may show signs of perishing; consider a professional inspection to maintain that solid ride quality.
A common point where cooling hoses and belts may be reaching the end of their design life due to heat cycles.
Consider having the fuel injection pump timing checked, as the OM602 is known for going the distance, provided the fueling system is kept in good order.
Keep up with regular oil and filter changes every 7,500km to protect the longevity of that famous Mercedes-derived engine.
Periodically cycle the 4WD selector to keep the vacuum lines and hub mechanisms free and operational.
Keep an eye on the underside for any signs of surface rust, especially around the chassis rails, and treat as necessary to keep the vehicle in great shape.
Ensure the coolant is flushed on schedule; the alloy head likes clean fluid to prevent internal corrosion over time.
Regularly grease the drive shaft nipples if your specific configuration allows, as it helps keep the drivetrain feeling smooth and quiet.
Estimated repair costs if issues arise
If the radiator or hoses show signs of age, it is a wise move to budget for a refresh to ensure long-term engine health during those Kiwi summer road trips.
Depending on the car's history and the roads it has traveled, you might eventually need to budget for new control arm bushes to restore that factory-feel handling.
If you notice the engine losing its usual efficiency or idle smoothness, you might eventually need to budget for professional cleaning or recalibration of the injectors.
Noticed something inaccurate or missing?Suggest an edit→
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