What does the manual say? Doing extra maintenance does not hurt, but some is not required. All of those services can be done by an independent shop, usually for less.

 

Dealership will suggest several useless services. Have the brake fluid replaced by them, decline the rest. May pull the spark plugs see how they look. Mind you, at H all these will shock you $$$ spark plugs alone may be into the hundreds. Transmission fluid don't touch given you do little miles. EFI and throttle body not needed.

 

Here's how I roll:

1. Throttle body clean every 50,000 miles.
2. Trans drain and refill NO FLUSH! every 30-60,000 miles, depending on trans reputation and driving conditions.
3. Brake fluid flush every 3 years.
4. Spark plugs per manual. 45,000 miles for the turbo I believe.
5. EFI service aka induction service aka wallet flush ... only if there's driveability issues.

 

1. Trans fluid drain and fill
2. Plugs
3. Transfer case and rear differential gear lube change
4. Antifreeze change
5. Valve cleaning
6. PCV valve