2005 — 2008
1.7L M266 - B170
Petrol
Listen for transmission whine or hesitation when accelerating gently. | Description: The CVT (Autotronic) transmission in the W245 can be sensitive. It's common for these to show signs of wear, so ensure smooth gear transitions without unexpected flares in RPM.
Check the dashboard for any flickering displays or warning lights. | Description: The electrical systems, particularly the instrument cluster pixelation and SAM (Signal Acquisition Module) units, can occasionally display quirks as they age.
Turn the steering wheel fully to the left and right while stationary. | Description: Listen for clunks or groans from the front suspension. Bushings and ball joints are regular wear items on these chassis and may need professional inspection.
Check the service history for recent coolant or oil leaks. | Description: The M266 engine has specific seals that can gradually harden over time. Look for any dampness around the engine block or under the vehicle after a test drive.
Usually the point where suspension bushings and engine mounts are inspected for signs of perishing.
A common interval where the transmission fluid should have been changed at least once; if not, it is worth discussing with a specialist.
Consider a comprehensive check of cooling system components like hoses and the radiator to maintain reliability.
Verify the service book shows regular oil changes using the correct Mercedes-approved synthetic oil.
Check that the panoramic sunroof (if fitted) operates smoothly and the seals are free from debris to prevent water ingress.
Confirm the air conditioning system cools effectively, as the compressor is a known wear component.
Inspect the tyre condition across all four wheels for uneven wear, which helps identify potential alignment or suspension needs.
Ensure all electronic functions, including the windows and central locking, operate consistently across all doors.
Estimated repair costs if issues arise
The Autotronic gearbox requires specific maintenance. If you notice shuddering, it might be worth budgeting for a specialist transmission flush or potential valve body repair to keep things shifting smoothly.
To maintain that solid German ride quality, you might eventually need to budget for replacing front control arm bushings or ball joints as they naturally wear out over NZ roads.
Vibrations at idle can often be traced to the engine mounts. If the car feels a bit 'buzzy' while stationary, setting aside funds for a set of new mounts will restore that quiet cabin experience.
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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