I've searched the web and Youtube for information about this model with air suspension but can't find an answer. Lots of information about earlier models.
To replace the upper wishbone do I have to remove the air shock to get access to the side bolts? If so, is the Torx bolt at the bottom of the shock a T-60?
Thanks!

 

Unfortunately, yes you do have to remove the air shock to access the bolts. Yes, the Torx bolt at the bottom of the shock is a T-60.

 

Front or rear upper wishbone ? The lower shock bolts at the front are notorious for seizing in the shock bush. Most shops won't give quotations for the front, only estimates. If the bolt seizes, it will be necessary to remove lower wishbone and shock together in order to get the assembly on the bench to saw the bolt off.

 

True, mine were seized and a real bear to come off as the tech showed me. He put on a sizeable power bar and asked me to put my considrable frame behind it......the bar was bending and would break before that bolt would move