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.

Take your remote and hold it up towards your rear view mirror or your visor whitchever is the one with 3 buttons of your homelink , also make shure that your opener has a program button which come in different colors depending on the year of the machine, if you have a program button on your powerhead of your garage door opener then you can mostlikely program your car to it! The button on garage door opener comes in different colors such as yellow,green ,orange, black, grey and black ! make shure your opener has one of these buttons! Now take your remote and point it within a few inches of your visor/rearview mirror and hold the button down that oppens that door....now press the first button on your car mirror/visor until the door opens up , it take sometimes a few trys but remember to leave your car running while doing this and have it outside the front of your garage door while doing this!

Thanks filter4991;
1. Press and hold button on car's rearview mirror
2. Press and hold button on garage door opener's remote control.
3. Light on Rearview mirror will flash rapidly.
4. Release both buttons.
5. Locate learning button on garage door opener (generally this can be found by tracing the antennae to where it is attached to the unit.)
6. Press and release "Learning button"
7. Press and release rearview mirror button repeatedly until garage door opens/closes but it should work the first or second time.

Worked on Genie Intellicode and Hyundai Tuscon

Push and hold the two outer buttons until the LED flashes fast Approx (15 seconds) then hold your garage opener up to the mirror or visor and push and hold any button 3 or 4 seconds on the opener Now the Home Link is programed. With the car safely away from the closing garage door find and push the garage openers red programming button (on the motor assembly somewhere that gives you about 30 seconds to push your cars home link button so the garage opener learns the button you want to use for that door the other two buttons can be programed for other doors or house light controler gate opener in the same manner

try holding the button on the mirror down til you see a flashing light then push the button on your garage opener for the car to record the signal

If this is the 3 button HomeLink Transmitter usually centered overhead above the rear-view mirror, this should work:

While the engine is turned off follow these steps to program up to three channels:
1. Decide which one of the 3 channels (one of the 3 HomeLink buttons) you want to program.
2. Press & hold the desired button through step 3.
3. When the HomeLink indicator light begins to blink slowly(this may take up to 30 seconds), hold your hand-held garage door remote about 1 to 3 inches away from the buttons & then press and hold the button on your garage door remote. Continue to hold both buttons until the indicator light on the HomeLink begins to flash rapidly(this may take up to 90 seconds).

If it still doesn't work, make sure the batteries in your garage remote are not weak, and try again moving the remote back & forth and left & right or turning it upside down while programming.

Also note HomeLink will not work with older garage door openers, especially not with ones manufactured before April 1st 1982.

There was a minor change for mine to work.. see below..

- you must park your Prius close to the gate opener, leaving it running (obviously not in the way of the gate closing)
- Hold the button the the mirror and then push your garage door remote button and hold until the light on the mirror starts to flasyh fast. THIS programs the button on the mirror, but not the garage opener - yet (this was key for me)
- locate the "learning button" on the opener itself
- press the "learning button" on your gate opener and then get back into the Prius within 30 seconds (more time than it sounds) and press the SAME Homelink button you just programmed above. I don't recall how long I held the pre-programmed button, but the light will flash as I recall.
- Then, when working the garage door, you may need to hold the mirror button for a good second for it to work - but I had tried for months to get mine to work, and finally after reading many posts, the above sequence worked on my 2008 Prius with my Lift Master, Security + rolling codes garage opener.

Just - program the button on the mirror with your remote FIRST.. the garage opener will not work.. then use the Learn button on the garage opener and the SAME BUTTON you just programmed.. and it worked great for me. Not programming the mirror button first will not work. Using only the Learn button will not work. You must program the mirror first with the remote, then use the learn button and the SAME button on the mirror. Hope this helps.

Scott 2008 Prius with Lift Master Security + opener.
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1. Press and hold the two outside garage opener buttons located on rear view mirror until the red LED light blinks (could be 20 sec.)
2. Press and hold the middle button on the rear view mirror while holding a garage door remote 1-3 inches away from the mirror and pressing the remote button. Do this until the blinking LED gets noticeably faster.
3. Once programmed - use the garage door opener on the mirror thru 3 cycles or more to verify.

Verify the hand-held transmitter is operative.
Prepare for programming the universal transmitter by erasing all three channels (hold down the two outside buttons until the red light begins to flash [20-30 seconds]). Release both buttons.
Select one of the three universal transmitter channels to be programmed by pressing the desired button
Hold the end of the hand-held transmitter 25-51 mm (1-2 in) from the front surface of the universal transmitter so that the red light can still be seen
Use both hands to press the hand-held transmitter button and the desired button on the universal transmitter. Do not release either button.
Hold down both buttons until the red light on the universal transmitter flashes, first slowly and then rapidly. Release both buttons when the rapid flashing begins. The universal transmitter has successfully learned the new frequency signal and can be used in place of the hand-held transmitter(s).
If the hand-held transmitter appears to program the universal transmitter but does not open the garage door, the garage door opener may have a code protected or rolling code feature.
To operate, simply press the appropriate button on the universal transmitter. The red light is on while the signal is being transmitted.
IF THE GARAGE OPENER HAS ROLLING CODES---
program as above then------
Train the garage door opener receiver to recognize the universal transmitter.
Remove the cover panel from the garage door opener receiver.
Locate the training button on the garage door opener receiver. Location and color of the button may vary by garage door opener manufacturer. Refer to the garage door opener instruction manual or owner literature.
Press the training button on the garage door opener receiver for 1-2 seconds.
Press the programmed universal transmitter button for as long as the universal transmitter red light flashes (1-2 seconds). Release the button and re-press the button to confirm that the universal transmitter is trained to the receiver.
The garage door opener should recognize the universal transmitter.

If you hold the 1st and 3rd botton down in your honda built in remote for aprox. 60 seconds or until the light next to the bottons goes out, this will erase the program from the car. You shouldn't have to mess with you garage door opener at all.