LazyDriver

The manual and a MB instructional video describe "convenience opening". Using this feature you can open the windows and the sunroof with the smart key to air the car out a bit before you step in.

The manual says all you do to activate this is press and hold the unlock button on the key.

I find this very buggy. Sometimes it works. Sometimes it doesn't. I can't figure out what the trick might be.

Googling around some people say the key has to be very close to the car and pointed directly at the driver's door handle. For me, that seems to help sometimes, but only sometimes.

Is there a trick anyone has figured out to make this work reliably? Summer's here and it would be useful if it worked as described in the manual...

Plutoe

What you read at Bens Wurld is all HS----assuming you have set correctly and have good key batteries you should be able to use the feature from 20+ feet----be patient read the manual again or call your grandson!!

LazyDriver

I'm doing exactly what the manual says from 3 feet away, and I have no grandson, not even a son. So I guess you're saying this is one for the dealer?

What do you mean by "set correctly"? What needs to be "set"? The manual says push and hold the unlock button and the feature will work. There's no mention of any settings. Thx.

Plutoe

Excuse the language,but what you did with the unlock button is what I call a setting.

If you go to the dealer after 12,any service writer worth his salt will be able to show you how to use the feature!!

guido3

There's no need to be close to the car or to direct the signal at it. Earlier models used a dual signal system (infrared + radio) with an IR sensor in the door handle (small black square). Good system but no longer used, at least in the GLC.

LazyDriver

Thanks for the note. So for you, this works from say, 15 or 20 feet away? You just push and hold the button for 2-3 seconds and the windows start opening?

guido3

Yes, it has worked when I tried it a few times. I've only done it while approaching the vehicle at a point where I clearly see it before opening the windows --probably 20 ft max. Not sure if it makes a difference, but I've always locked/unlocked the vehicle with a quick click first then a longer second hold (3-4 sec) for the all windows closed/opened function.

LazyDriver

Thanks. I tried it with my second key to see if it might be a problem with the key and got basically the same result. Sometimes it works. Sometimes it doesn't. Like you, I find that it works a higher percentage of the time on the 2nd, or 3rd, or 4th click... I also seemed to find it works best from about 5 feet away laterally from the rear corner of the car, pointing toward the front door. When I have time I'll ask the dealer about it...

guido3

I believe the antenna for the key fob RF signal is integrated in either the exterior mirrors or the roof spoiler. Just a wild guess but maybe the dealer can run a diagnostic to check the connections to the antenna. Loose connections are not likely but do happen.

STill_matic

I've noticed some inconsistencies also. I resorted to click to unlock, then hold to open all.

IASCA

Philamg

You can disable the key inside the car by pressing the lock button twice quickly, it allows you to then leave the key in the car.

peet

And if you want to blow your mind... let's say your limit is 20 feet, try it at 30 or 40 feet by pushing the button into your lower jaw bone. The area right under your chin. Then push the button.

For some reason, most people's head bone strengthens the RF sent and extends the range of the remote. Don't joke - just try. I LOL'd when I first heard of this, now use it all the time when out of range or forgot if I locked the car.