2010 Acura RL Owner's Manual - Page 237

Audio System The XM satellites are in orbit over the equator; therefore, objects south of the vehicle may cause satellite reception interruptions. To help compensate for this, ground-based repeaters are placed in major metropolitan areas. Satellite signals are more likely to be blocked by tall buildings and mountains the farther north you travel from the equator. Operation in Alaska Signal may be blocked by mountains or large obstacles to the south. Signal weaker in these areas. SATELLITE Because XM is unavailable in Alaska, the XM hardware equipped with your vehicle cannot be operated. GROUND REPEATER 234 2010 RL