We would suggest you visit the nearest authorized service center for the exact information regarding the service cost of the Mercedes A-Class.Click here for the service center: click here
For the availability and price, we would suggest you walk into the nearest authorized service centre as they will be the better person to assist you. You can click on the following link to see the details of the nearest service centre and selecting your city accordingly - Service centre
As of now, the brand hasn't revealed the complete details of Mercedes Benz A-Class. So we would suggest you wait for its launch and stay tuned for further updates.