I was thinking of a page that would be accessible to customers who have signed up for a service contract that would let them see or do the following:

• View terms and conditions
• View start and end dates
• View details of contract
• Add, edit, or remove credit card details for auto-pay
• Change from annual to monthly payments (or vice-versa)
• Disable or enable "auto renew"
• View associated diagnostic reports and pictures
• Schedule "system generated" appointments in the calendar similar to the online appointment system
• Add/edit customer details like phone numbers, email addresses, communication preferences, billing address, etc.