The recommended interval for the major service is every 20k miles (30000 km). This work is done in addition to that specified for the annual inspection service. The list below is the minimum you should expect from your local franchised dealership or specialist workshop -

• Condition of V-belts checked & replaced as necessary
• Sliding roof guide rails cleaned and lubricated
• Cabin dust & pollen filter renewed
• Underbody sealment visually inspected for damage