Ok I got 220 000km on my Maxima and I'm going to the dealership at 5am and its 11h29pm to get a major tune up. I dont care about the money.

What should I ask them to do?

Change spark plugs (NGK Platinium)
Check Timing
Change Oil filter
Change gas filter
Clean throttle body????
Check fuel injectors
Change 02 sensor (check engine light)
UPV???

What else????

 

I would add the pcv valve to that list - it's pretty cheap. The throttle body clean for sure. The timing does not need to be checked since the Max has electronic ignition timing (i.e no distributor).