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Introduction
Applicable to H4Bt engines.
The oil draining and level checks must be done on a flat and leveled surface.
Lifting the vehicle isn't necessary if you are thin enough to go under.
Change every: 20,000km/1 year under optimal driving conditions. Reduce the oil change interval (OCI) if driving under severe use cases.
Note: recommendations are given according to the French RTA's (Revue Technique Automobile) maintenance plan, matching Smart 453's maintenance plan in this case.
Please refer to the wiki defining what may be considered as a severe use case and to get the oil specifications.
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Unscrew the 6 screws by hand or with a T50 socket.
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Lift and set aside the engine hood.
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Lift the dipstick and remove the oil filler cap to help the oil flowing out later on.
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Place a drain pan under the vehicle.
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Unscrew the drain plug using square 8mm key, then finish by hand.
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Let oil drain until it stops dropping.
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Move the drain pan under the oil filter compartment.
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Unscrew the oil filter lid.
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Replace and fit the new oil filter in its compartment until it clicks in place.
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Replace and gently lube the lid's seal with engine oil.
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Torque the lid at 25 N.m.
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Clean off the oil pan and the area around the drain plug.
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Replace the drain plug's copper seal. The grooved side should face the top of the drain plug if it has one.
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Torque the drain plug using an 8mm square socket at 50 N.m.
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Ask FixBot
Congratulations !
You now only need to fill the oil pan up to the MAX level and check the level again once the engine has runed briefly.
Don't forget to reset the oil change indicator on the dashboard once finished !
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