I have the same problem on my '05 Legacy Ltd 2.5i wagon with automatic transmission. It seems that instead of feathering in and out of the throttle the '05's cruise control just lifts completely and then stabs at the gas to try and maintain speed down hill. If the cruise control has as much trouble applying gas smoothly as the drivers sometimes do with the "drive by wire" throttle it's no wonder it lurches. The system is probably working as designed BUT if Subaru wants to even remotely hope that they are competing with upscale cars such as BMW or Audi such annoyances certainly won't help them achieve that goal. I really like the new Legacy's but they are full of little quirky thinks like this that can be a constant reminder that you are not driving a BMW !
Last edited by rts; 06-07-2005 at 08:53 PM..