The 2008 Saturn Astra replaces Ion as this GM division's new entry-level car. XE and top-line XR trim levels are available for 4-door models, only XR for the 2-door. Both use a 138-hp 1.8-liter 4-cylinder engine and a 5-speed manual transmission or optional 4-speed automatic. Available safety features include ABS, traction control, antiskid system, curtain side airbags, and front side airbags. Among Astra's standard features are OnStar assistance, cruise control, tilt and telescopic steering wheel, heated power mirrors, and rain-sensing wipers. Available for 4-door models is a 2-panel sunroof that Saturn claims is the largest in the class. The 2008 Saturn Astra shares its basic design with the Opel Astra built by General Motors' European division. Note that the Astra has conventional steel body panels, not the dent-resistant plastic panels that were once a Saturn hallmark.