80000 km service

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My GS hit 80000 km yesterday (doing 120km/h down a California highway). What's on the 80000km service checklist, and anything specific I should watch out for while doing it?

The list so far:

• Inspect, tension, and possibly replace timing belts
• Hydraulic fluid flush
• Adjust rocker clearances
• Ignition timing?
• Replace the in-line fuel filter
• Lubricate suspension ball joints
• Check/replace spark plugs (Any point in platinum/iridium? Are these non-resistor plugs?)
• Inspect/replace alternator belt

Unfortunately, the car didn't come with service records, so I'm not sure when any of these were last done.