Smart Roadster, 452

Automatic transmission fluid capacity & service interval

Smart Roadster 452 automatic transmission fluid capacity is 1,7 liters. Service intervals include normal use. Data covers 3 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

Type	Specifications
roadster (45 kW) (2003-2006)	Use: Normal Capacity 1,7 liter Code: 717.4xx 6/1
roadster (60 kW) (2003-2006)	Use: Normal Capacity 1,7 liter Code: 717.4xx 6/1
roadster Brabus (74 kW) (2003-2006)	Use: Normal Capacity 1,7 liter Code: 717.4xx 6/1

The Smart Roadster 452 uses a semi-automatic transaxle layout, meaning the transmission fluid serves a combined gearbox and axle assembly rather than a standalone gearbox unit.
All three power variants of the Roadster 452 — the 45 kW, 60 kW, and Brabus 74 kW — share an identical fluid capacity of 1.7 liters for the semi-automatic transaxle.
A capacity of 1.7 liters is consistent with a compact transaxle fill, reflecting the small physical scale of the semi-automatic unit fitted across the Roadster range.
The 1.7-liter figure applies under normal use conditions across all three configurations, covering the 2003-2006 model years without variation by output level.
The uniform capacity across the 45 kW, 60 kW, and Brabus 74 kW variants indicates the same transaxle unit is used regardless of engine tune, with no capacity adjustment made for the higher-output Brabus specification.