What is everyone's experience with the range of the garage/gate opener. My is very weak [!] I practically have to be 15 ft. from the opener for it to work, this applies to both the gate and the garage. With the regular opener, I could be about 70 ft. away. The opener in the Suburban and the Lexus works so much better i.e. longer, much longer range than the MB. Another thing that bothers me is that once the car is off, the opener is off too! Any suggestion or idea to increase the range is greatly appreciated.