2005 — 2009
1.7L (M266) - B170 Classic/Elegance
Petrol
Listen for whining or grinding noises while accelerating. | Note: The CVT (Autotronic) transmissions in the W245 series can sometimes experience belt wear; it is worth noting how smoothly the car transitions through speed.
Check the heater operation and air conditioning performance. | Note: Climate control flap motors in this model can occasionally stick, so cycle through the different air direction settings to ensure they move freely.
Observe the idle while stationary. | Note: The M266 engine can sometimes have issues with vacuum leaks or idle control valves; a smooth, consistent idle is a good sign of healthy maintenance.
Check the dashboard for any persistent warning lights after starting. | Note: Ensure there are no lingering SRS or Engine Management lights, as electrical sensors in these models can become sensitive as they age.
Usually the time for a major inspection of suspension bushings and engine mounts.
Common point for a professional CVT fluid change to help maintain transmission longevity.
A good interval to have a specialist check for any seeping oil gaskets around the engine block.
Keep up with annual oil changes using high-quality synthetic oil.
Check the cabin air filter regularly, especially if you live in a dusty or coastal NZ area.
Ensure the sunroof drains are cleared during service to prevent moisture build-up inside the cabin.
Rotate tyres every 10,000km to ensure even wear across the front-wheel-drive platform.
Have the brake fluid flushed every two years to maintain firm pedal feel.
Estimated repair costs if issues arise
While often overlooked, keeping the transmission fluid fresh is the best way to extend the life of the Autotronic unit. If this hasn't been done recently, you may want to budget for a service soon.
As these cars age, rubber components like control arm bushings or sway bar links may naturally lose their elasticity. If you notice any knocking over bumps, this is a standard maintenance item.
Vibration at idle is often a sign that the engine mounts have settled. Replacing these restores the smooth, refined cabin experience this Mercedes is known for.
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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