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Here is a list of
required maintenance items for the 928 S4 GT and GTS
Required every 12,500
miles (20.000 km)
Engine: visual inspection
for leaks
Engine oil and fresh oil filter
Cooling and heating system: check for leaks
Coolant hoses: check condition and tighten hose clips
Radiator: visual inspection for external fouling
Coolant (antifreeze); check level and antifreeze content and, correct if
necessary
Crankcase ventilation: check tightness of hose connections
Fuel system: visual inspection for leaks and tightness of line connections
Intake air: check hoses, lines and connections for tightness
Parking brake: check free travel of parking-brake lever and correct if
necessary
Brake pedal: check play of brake pedal and correct if necessary
Brake hoses and lines: visual inspection for leaks, damage and corrosion
Check brake fluid level and top up if necessary
Brake system: visual inspection of brake pads and discs to check for wear
Clutch: check play and correct if necessary
Clutch plate: check for wear
Hydraulic Clutch actuator: visual inspection for leaks
Steering gear: check screw connections for tightness
Visual inspection of the bellows for damage
Tie rod links: check play, tightness and dust caps
Power-assisted steering: visual inspection for leaks, check fluid level
and correct if necessary
Ball joints: visual inspection of dust caps for damage
Wishbone: check screw connections for tightness
Front wheel bearings: check play and correct if necessary
Manual transmission: check fluid level and correct if necessary
Automatic transmission: check fluid level and correct if necessary
Drive shafts: visual inspection of sleeves for leaks and damage
Exhaust system: visual inspection for leaks and damage, check screw
connections for tightness and attachment
Tires: check condition and correct tire pressure
Door arrester: check operation and lubricate
Check door, engine hood locks and safety hooks on front hood for tightness
and function
Seals for doors, hood and roof: remove abraded rubber, apply suitable
agent to seals
Check operation of vehicle lighting
All headlights: check setting and correct if necessary
Horn: check operation
Throttle actuator: check for smooth running
Windshield washer system: check function, check fluid level and nozzle
setting
Headlight washer : check operation, check fluid level and nozzle setting
Battery: check fluid level and top up if necessary
Check operation of all electrical control equipment and optional extras
Heater, ventilation and air-conditioner blower: check operation
Required every 25.000
miles (40.000 km)
Automatic transmission:
change ATF and ATF
filter, clean ATF strainer
Replace Spark Plugs (or
every 2 years)
Replace Aux Air filter
Replace Air filter
Check oil in Cambelt
Tensioner
Check Timing belt (camshaft belt) for
damage and tension
Required every 60.000
miles (100.000 km)
Manual Transmission:
change transmission oil
Differential:
change final drive oil
Fuel Filter replacement
Replace Timing belt (camshaft belt)
or every 4 years.
Required every 2 years
Brake system: renew brake
fluid
Cooling system: renew coolant fluid
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