samkimg

Hi All ...
I would like to know if anyone knows how to have the E350 arm the alarm system by itself once I've walked away from the car?
I've sometimes wandered off without locking the doors and I want the car to lock itself to help my sometimes forgetfulness.

K-A

I know the pre 212's arm themselves up after a certain short period of time, in case you forget. I'm sure the new E shouldn't be different.

sosh

After having a W211 for 5 years and a W210 before it for 4 years I can say that I have never seen the alarm arm itself unless the car was locked with the remote (no keyless go in those). I do know that if the car is unlocked with the remote and not driven it will relock itself after a period of time and reset the alarm at that point.

aeggroup

+1...
This option does not exist in current and previous models.

Diesel Benz

The car locks doors itself if the door locks are first unlocked from the remote but no door is touched (opened). In this case the car knows that nobody is inside the car and it is safe to lock it (the driver probably forgot doors were opened and walked away for something else).

220S

That's right (in case you inadvertently hit the fob remote while in your pocket, etc..)

And nobody would want the car locking on its own accord when you don't want it locked.

K-A

Ah, maybe that's what I've experienced then. Dunno about it locking on its own after I get out of the car if I forgot to arm it, as I've never done that, but I know if I unlock it with the Key FOB, and leave, the car will lock and arm itself back up.