New York-based Sirius Satellite Radio [SIRI] and XM Satellite Radio [XMSR], two U.S. satellite radio service providers, announced their services will be available as factory-installed equipment or dealer-installed options beginning this June on the 2005 Audi A8L, the TT Coupe and the TT Roadster. A retrofit kit also will be available for the 2004 A8L to allow this model to receive both services.