Maintenance

     I'm planning to take my 2012 177 to the dealer later this spring to have the wheel bearings inspected and brakes adjusted.  While the pod is in the shop, are there any other maintenance items that should be performed on a 4 year old pod?  The flyers from Camping World make it sounds like every system should be checked annually (for hundreds of $$$).  I'm skeptical of these ads but wonder if I might be missing something.

Thanks,

Rob