2000 — 2001
2.7L I5 Turbo Diesel (120kW) - ML270 CDI
Diesel
Open the hood and listen for a rhythmic 'chuffing' sound or look for black, tar-like residue around the injectors under the engine cover; in ML270s of this age, it is common to consider whether the fuel injector copper washers have been replaced recently.
While driving at various speeds, pay close attention to the smoothness of the gear changes; depending on the service history, the 5G-Tronic transmission may eventually require a conductor plate or fluid service to maintain its refinement.
Perform several tight, low-speed turns in a car park to check for binding or shuddering; it is often helpful to verify if the transfer case and differential fluids have been refreshed to keep the 4WD system healthy.
Systematically operate every window switch and electric seat adjustment multiple times; in these early M-Class models, it is worth considering that the interior switchgear and window regulators might eventually need attention.
Complete transmission fluid and filter exchange to protect the gearbox internals.
Inspection of the serpentine belt, tensioners, and the health of the glow plugs for reliable winter starting.
Comprehensive check of the cooling system, including the radiator and water pump, to prevent overheating.
Assessment of the high-pressure fuel pump and turbocharger hoses for any signs of age-related wear.
Ensure the oil and filter are changed every 10,000km to preserve the 2.7L inline-five diesel engine.
Keep the sunroof and cowl drains clear to prevent moisture from reaching the cabin electronics.
Verify the age of the battery, as these vehicles are sensitive to voltage drops which can cause 'ghost' faults.
Regularly inspect the brake lines and suspension bushings for signs of perishing due to NZ's coastal environment.
Check that the low-range 4WD engagement motor is cycled occasionally to prevent it from seizing due to lack of use.
Estimated repair costs if issues arise
If the injector seals show signs of leaking, you might eventually need to budget for professional cleaning of carbon deposits and the fitment of new copper washers and stretch bolts.
Future budget planning should account for the internal electronic conductor plate in the gearbox, which is a common maintenance item if the car begins to hold gears or enters 'limp mode'.
Given the weight of the ML, you might eventually need to budget for replacing the front ball joints or control arm bushings to maintain a crisp steering feel and pass WoF inspections.
Depending on the car's history, you might eventually need to replace rubber intake hoses that can split over time, leading to a loss of power and black smoke under acceleration.
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