55k Maintenance, What is needed?
 

Hello,
Question is I was quoted for $850 for my 55k maintenance on my 2005 Audi A8. The cars service notification came on and is down to "service car in 200 miles" it started at 1000. I called the dealer and they told me the service includes new air filter, pollen filter, spark plugs, oil change and maybe one or two things, and some suspension check. Out of these things are they all needed? I have a friend who is a good mechanic, (not on Audi's though) who would know how to do general stuff. What should I have done through him, what should I not have done until later, and if anything what should I let the dealer do?
Thanks,
Really appreciate it.
Robert