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Servicing guides and mods

451 Service Schedule

How often does a smart fortwo 451 need to be serviced?

Modification Details




The 451 engines

30kW (41bhp) turbo diesel
40kW (54bhp) turbo diesel 
45kW (61bhp) non turbo petrol
45kW (61bhp) non turbo petrol MHD
52kW (71bhp) non turbo petrol
52kW (71bhp) non turbo petrol MHD
62kW (84bhp) turbo petrol
72kW (96bhp) Brabus turbo petrol

Service

Every 15,000 km (10,000 miles) or 1 year

62kW turbo petrol, 72kW and diesel engines

Every 20,000 km (12,000 miles) or 1 year

45kW and 52kW petrol engines

Service Intervals

Oil service +, maintenance service, oil service +, maintenance service, repeat.

Extra Maintenance

Every 40,000 km (24,000 miles)

Spark plugs replaced (45kW and 52kW petrol engines)
Air filter replaced (45kW and 52kW petrol engines)

Every 45,000 km (30,000 miles)

Spark plugs replaced (62kW turbo petrol and 72kW engines)
Air filter replaced (62kW turbo petrol, 72kW and diesel engines)

After 60,000 km (36,000 miles) and then every 2nd service

Drum brake thickness check

Every 60,000 km (36,000 miles)

Poly V-belt replaced (diesel and MHD engines)
Fuel filter replaced (diesel engine)

Every 60,000 km (36,000 miles) or 4 years

Engine coolant replaced (petrol engines)

After 80,000 km (50,000 miles) and then every service

Wheel brake cylinder collar seal and brake adjuster checked for damage
(45kW and 52kW petrol engines)

Replace transmission fluid (Evilution recommendation, not on smart schedule)

After 90,000 km (56,000 miles) and then every service

Wheel brake cylinder collar seal and brake adjuster checked for damage
(62kW and 72kW petrol engines)

After 90,000 km (56,000 miles)

Spark plugs replaced (45kW and 52kW petrol engines)
Poly V-belt replaced (62kW and 72kW petrol engines)
Valve clearance checked and adjusted (62kW and 72kW petrol engines)

Every 100,000 km (62,000 miles)

Spark plugs replaced (45kW  and 52kW petrol engines)
Poly V-belt replaced (45kW and 52kW petrol engines except MHD)
Valve clearance checked and adjusted  (45kW  and 52kW petrol engines)

Every 120,000 km (75,000 miles)

Change the timing chain (not on smart schedule)

Every 2 years

Brake fluid replaced (this seems excessive, I'd suggest 4 years).

Scope Of Service

Oil Service +

Brake system: brake fluid level checked and corrected, brake test carried out on dynamometer.
Brake fluid: wet boiling point checked.
Brake lines and hoses: condition checked.
Parking brake checked.
Power windows, rear window heating, seat heating, cigarette
lighter and mirror setting checked for correct function .
Indicator lamps in the instrument cluster and interior lighting checked for correct function.
Horn, headlamp flasher, hazard warning lamps and turn signal lamps checked for correct function.
Windscreen wipers and windscreen washer system checked for correct function.
Headlamps: range control checked.
Replace combination filter.
Tyre sealant expiry date checked.
Bodywork inspected for paintwork damage.
Windscreen: condition checked.
Exterior lighting checked for correct operation.
Windscreen washer system: washer fluid level checked, corrected.
Soft-top: checked for correct function (cabrio only).
Front axle: brake pad thickness checked, condition of brake discs checked.
Rear axle: brake lining thickness checked.
Complete wheels: checked for damage and cracks; tread depth measured.
Engine: coolant level and antifreeze content checked, corrected.
Exhaust system: checked for damage and leaks, including the mountings.
Underbody panelling and underbody: condition checked.
Poly-V-belt checked for wear and damage.
Engine and transmission: checked for damage, leaks and mounting defects.
Engine: oil changed and oil filter replaced.
Service display in the instrument cluster reset.

Maintenance Service

 
Brake system: brake test carried out on dynometer.
Parking brake checked.
Indicator lamps in the instrument cluster and interior lighting checked for correct function.
Power windows, rear window heating, seat heating, cigarette
lighter and mirror setting checked for correct function.
Horn, headlamp flasher, hazard warning lamps and turn signal lamps checked for correct function.
Heating and ventilation: controls checked for correct function.
Windscreen wipers and windscreen washer system checked for correct function.
Seat belts and buckles checked for operation and external damage.
 
Replace combination filter.
Tyre sealant expiry date checked.
Battery fluid level checked, corrected.
Key with remote control: replace the battery.
Bodywork inspected for paintwork damage.
Windscreen: condition checked.
Exterior lighting checked for correct operation.
Brake system: brake fluid level checked and corrected.
Brake fluid: wet boiling point checked.
Windscreen washer system: washer fluid level checked, corrected.
Central locking: checked for correct function.
Soft-top: checked for correct function (cabrio only).
 
 
Headlamp adjustment checked and corrected.
 
 
Headlamps: range control checked.
Front axle: brake pad thickness checked, condition of brake discs checked.
Rear axle: brake lining thickness checked.
Complete wheels: checked for damage and cracks; tread depth measured.
Tyre pressure checked, corrected.
Engine: coolant level and antifreeze content checked, corrected.
Exhaust system: checked for damage and leaks, including the mountings.
Underbody panelling and underbody: condition checked.
Brake lines and hoses: condition checked.
Fuel lines: checked for condition and leaks.
Poly-V-belt checked for wear and damage.
Engine and transmission: checked for damage, leaks and mounting defects.
Engine: oil changed and oil filter replaced.
Front axle: joints checked for play; condition of rubber gaiters checked.
Tie rod and steering arm joints: checked for play; condition of rubber gaiters checked.
Service display in the instrument cluster reset.

Thanks to Michael V for typing the scope of service out for me.

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