I'm pretty sure that US market X351 XJs do not have the double-locking feature in European models. If you press the door handle button or SmartKey lock button twice and the car's sounder beeps at you, that's an error tone and not a confirmation that it's double locked.

And yes, you should always lock your XJ, even when parked in your garage, as doing so shuts off convenience mode and minimizes the drain on your battery. Also, never leave your SmartKey in the car as doing so will keep convenience mode on and drain the battery. And keep the key at least 15 feet away from the car so it doesn't activate convenience mode.

Because I'm retired and no longer commute to work daily, I always keep my XJ plugged into my CTEK MUS4.3 battery maintainer when it's parked in my garage. That keeps the batteries fully charged and will extend their lives. I alternate between hooking up the primary battery and the small stop-start battery.

 

Yeah im not sure our cars have the double push thing either, ive never tried that, but yes pressing the lock button on the handle is the same as the lock on the fob. i pretty much exclusively use the handle to lock mine in my garage and since then stopped getting the occasional low battery warning. I dont keep my fob more than 15 away from the car, that would be difficult for me, but either way it seems to accomplish the task.

that being said i drive the car daily, so your situation might be different.

 

 

 

That sounds weird in that i have the opposite sometimes. I will hit lock, either on the fob or the handle, and the mirrors just wont turn in. a few random button pushes and door openings and everything is back to normal. i chocked it up to a combination of my remote start and it just being British.

Once you fire up the car, do the mirrors then rotate out?

 

I was at the dealership today and mentioned it to the service folks. They ‘sluffed’ it off as a potential programming issue and said if it gets worse, then bring it in. If it happens again, I’ll check out starting the engine to see what happens.

 

I'm not a tech, but logic dictates that there's one switch and circuit for the door lock and another for the mirrors. Since the doors open first, and then the mirrors unfold, maybe you need to pull the door handle a bit harder to make sure you're making good contact with the second switch for the mirrors. It's worth a try. Let us know if that makes any difference.

Of course, I could be totally wrong.