There seems to be a new thread every week pertaining to maintenance intervals and the associated part numbers, so here we go, maybe we can get this sticky'd .

25000 miles
Change engine oil/ oil filter (078 115 561 K)
Reset service reminder display
Check:
windshield washer, wipers
tires, and spare wheel
Road test and check kickdown, steering, electrical, h-vac systems, power accy's.

35000 miles
Change engine oil/ oil filter (078 115 561 K)
Reset service reminder display
Replace cabin pollen filter (4B0 819 439 C)
Replace spark plugs (101 000 063 AC)
Clean air filter housing and replace filter elements (077 133 843)
Clean intercooler hoses
Replace fuel filter (6N0 201 511 A)
Relplace: Timing belt (078 109 119 J)
Relay roller (077 109 244 C) x2
Tensioner lever (077 109 485 F)
Tensioner dampener (077 109 479 D)
Roller (077 109 244 E)
Water pump (077 121 004 P)
Gasket (078 121 043 A)
Thermostat (077 121 113 D)
O-ring (+N 901 368 02)
Ribbed belt (077 903 137 Q)
Clean radiator and condenser externally
Clean intercooler externally
Check on board diagnostics for fault memory
Check tires and spare
Lubricate door hinges
Clean and lubricate sunroof mechanism

45,000 miles
Change engine oil/ oil filter (078 115 561 K)
Reset service reminder display
Check:
windshield washer, wipers
tires, and spare wheel
Road test and check kickdown, steering, electrical, h-vac systems, power accy's.

55,000 miles
Change engine oil/ oil filter (078 115 561 K)
Reset service reminder display
Replace cabin pollen filter (4B0 819 439 C)
Replace spark plugs (101 000 063 AC)
Clean air filter housing and replace filter elements (077 133 843)
Clean intercooler hoses
Replace fuel filter (6N0 201 511 A)
Clean radiator and condenser externally
Clean intercooler externally
Check on board diagnostics for fault memory
Check tires and spare
Lubricate door hinges
Clean and lubricate sunroof mechanism

65,000 miles
Change engine oil/ oil filter (078 115 561 K)
Reset service reminder display
Check:
windshield washer, wipers
tires, and spare wheel
Road test and check kickdown, steering, electrical, h-vac systems, power accy's.

75,000 miles
Change engine oil/ oil filter (078 115 561 K)
Reset service reminder display
Replace cabin pollen filter (4B0 819 439 C)
Replace spark plugs (101 000 063 AC)
Clean air filter housing and replace filter elements (077 133 843)
Clean intercooler hoses
Replace fuel filter (6N0 201 511 A)
Relplace: Timing belt (078 109 119 J)
Relay roller (077 109 244 C) x2
Tensioner lever (077 109 244 C)
Tensioner dampener (077 109 479 D)
Roller (077 109 244 E)
Water pump (077 121 004 P)
Gasket (078 121 043 A)
Thermostat (077 121 113 D)
O-ring (+N 901 368 02)
Ribbed belt (077 903 137 Q)
Clean radiator and condenser externally
Clean intercooler externally
Check on board diagnostics for fault memory
Check tires and spare
Lubricate door hinges
Clean and lubricate sunroof mechanism

85,000 miles

Change engine oil/ oil filter (078 115 561 K)
Reset service reminder display
Check:
windshield washer, wipers
tires, and spare wheel
Road test and check kickdown, steering, electrical, h-vac systems, power accy's.

95,000 miles
Change engine oil/ oil filter (078 115 561 K)
Reset service reminder display
Replace cabin pollen filter (4B0 819 439 C)
Replace spark plugs (101 000 063 AC)
Clean air filter housing and replace filter elements (077 133 843)
Clean intercooler hoses
Replace fuel filter (6N0 201 511 A)
Clean radiator and condenser externally
Clean intercooler externally
Check on board diagnostics for fault memory
Check tires and spare
Lubricate door hinges
Clean and lubricate sunroof mechanism

Note:

Replace brake fluid ever two years regardless of mileage.