Wife's 2004 MB E320 is having problem with the buttons on the rear view mirror that open the garage door. First button works, second button does not work all the time. Tried a total reset and re-programed the first two buttons fine. But when trying to use the second button, again intermittent success with the second button. Tried this again but using the third unused button, same result.

**** >>> This setup I performed with my new 2010 BMW 528XI Garage Door Homelink and Chamberlain Garage Door Opener <<< ****

Chamberlain:
01. Power off or unplug the garage door opener motor power supply (which is mounted on ceiling of the garage) ;;;

02. keep the garage door opener transmitter in your hand (do not press any button at this time) ;;;

03. In your 2010 BMW 528XI Homelink button (which resides under rear view mirror) press the 1st and 3rd homelink button together for about 30-40 seconds (i.e., until the yellow light blinks fast) and when the yellow light next to the homelink button blinks fast release from pressing the (homelink) buttons ;;;

04. now hold the garage door opener transmitter closer (means within 2-4 inches) to the homelink button (either 1st or 2nd or 3rd) whichever you are planning to program to open the garage door ;;;

05. now press the garage door opener transmitter button and chosen homelink button (either 1st or 2nd or 3rd whatever you need) together ;;;

06. the yellow light (next to homelink button) initially may blink slowly but after few seconds (may be 10-20 seconds) will blink fast; once it started blinking fast release from pressing both garage door opener transmitter and homelink button ;;;

07. Now plug or power on the main garage door opener motor (which is mounted on garage ceiling) ;;;

08. On the main garage door opener motor (which is mounted on garage ceiling) press the "LEARN" button (once you press it may have yellow/orange color light; make sure the light is on) ; then within 30 seconds do the next steps #9, #10, #11 very carefully ;;;

09. go to your car and press the homelink button you programmed and hold it for 4 seconds and then release it --> 1st iteration ;;;

10. again hold the same homelink button you programmed and hold it for 4 seconds and then release it --> 2nd iteration ;;;

11. again hold the same homelink button you programmed and hold it for 4 seconds and then release it --> 3rd iteration ** important note; generally three iterations are not necessary; and steps #9, #10, #11 must be performed within 30 seconds ** ;;;

12. during one of the iteration you will hear "CLICK" sound one-time from Garage door motor (which is mounted on ceiling) and if you have light attached with it; it will blink once (** if you hear the CLICK sound and/or light blinks once**) then the particular homelink button is programmed ;;;

13. now press the programmed homelink button; the garage door will open or close (but always it will take 3 or 4 blinks in yellow light or 2-3 seconds before the garage door opens or closes and which is normal) ;;;

** Thats it, your 2010 BMW 528XI Garage Door Opener Homelink setup is complete ** ;;;

You can program rest of the homelink button the same way but following from the steps between #4 and #13 ;;;

Hope this steps will help you to program chamberlain Garage door opener in 2010 BMW 528XI Homelink. ;;;


** possibly the above same steps may work with other BMW 5-series cars homelink too (but I'm not sure) **