My 2005 coupe also has a parasitic drain. Here are my finding after digging into it this morning: With the car locked the drain was significant and fluctuating. In unlocked state the draw settled down to .25 Amp with all fuses in place. After checking all fuses I found Fuse #35 (instrument cluster) accounted for .05amp drain and #9 (int lights, horn, alarm) accounted for .17amp drain. Remembering that the RCM had been updated allowing the horn to work independently I'm removing fuse #9 to reduce the draw to .08amp, when unlocked. I did not check the draw by locking manually. Not ideal but an improvement