W221 D service - what should I ask the dealer (final service under motor plan)
2012 S class 350 CDI has a D service coming up in June, local dealer says this will still be covered by the extened 8 year plan ending middle of May.
Is there anything I should specifically ask dealer to check and what does D service cover over and above B service. Mileage is 45K kilometres.
Only issues I have noted recently:
1. Aircon wheezing sound at low speeds;
2. Clicking/knocking sound from right rear suspension - intermittent
3. Key battery needs replacing every few weeks
Thank you


