Ever since I got my Z3 a few months ago, I hated the bulky mirror. Then I learned that the reason why the mirror is so big is that the keyless entry unit is mounted inside it. I knew I have to find a better place for the keyless entry so I can replace the mirror, but didn't know where. Today I figured it out, and it turned out to be relatively simple operation. I disassebled the plastic cover of the top rail of the windshield and the A-pillar covers, fished the keyless entry cable under the dashboard, and mounted it on the side of the knee protection plate that's under the driver-side undercover. I was concerned that this will reduce the range of the keyless entry system, but it seems that it works just fine.