I own (3) CTEKS....(2) 3300s and (1) MUS4.3 My XK is never in the garage without it connected. All the CTEKs work well. I wouldn't own a Jag without one. I purchased all of them on Amazon.

 

Thanks for the clarification. It appears that all that CTEK did was to discontinue the entire MUS product line (US market) and rename it to conform to the rest of the world product line.

Here's the "new" MSX 5.0 Test&Charge:


Here's the old MUS4.3 Test&Charge:


Functionally, they appear to be identical. Amazon doesn't have the MSX5.0 Test&Charge yet.

 

I'm confident that regardless of which model you choose, they all perform well in maintaining the battery's health.

 

yes, ctek is a favorite on this forum but I use a different brand and it's worked for years without fail.

 

Am I the only one on this forum without a battery problem?
I don't have a garage. The car, an '09 XK Coupe, needs to endure NY Weather outside summer and winter, I do cover it up, the best I can, with a fitted cover which this year got blown off in a storm. The battery is by Auto-Craft, marked "Made in Germany", and was probably installed by the used car dealer where I bought the car, in November of 2017. I start the car once a month, and drive it when there is no snow on the ground and the snow melt chemicals are washed off the roads in the rain.
The one tip I received on this forum was to get into the habit of locking the doors with a double click of the button on the door handle. This action will shut down the car completely until the next ride.

 

Yes. Yes you are.

 

Nope, I don't have any either and mine gets thoroughly abused because my daily commute is less than 5 miles.

I do have a CTEK because I was plagued with issues on my '07 XKR until I replaced the battery. I have had my '10 XKR for nearly 2.5 years and only use the CTEK if I have been playing with my diagnostic gear without using a power supply or have been doing maintenance on the car that requires the car unlocked for a long period of time and the doors being left open then I might treat it to an overnight boost. The rest of the time the CTEK stays in the cupboard because the factory supplied battery maintainer (alternator) seems to do the job it was designed for.

Like you, I find that locking the car when not in use is all it seems to need. On the days that I go drag racing where I am constantly getting in and out of the car and stopping and starting it I just make sure it stays locked as much as possible even when I am sitting in it with the engine off waiting for the next run. That way the touch screen is off and most of the accessories shut down.

 

Double-locking, which prevents the doors from being opened from the inside (as well as the outside) is a feature on European X150 models. It is not available on US models pursuant to Federal law, as it is considered unsafe. See:
https://www.motor1.com/news/65370/as...-in-us-recall/

The double-beep you hear after pressing the lock button a second time is an error message.

If your US model X150 doesn't beep, you have a defective sounder and should replace it. Ask me how I know.

 

Huh, mine doesn't do that. First push of the LOCK button locks the doors, but not a beep and no lights. The second push of LOCK beeps once and flashes the lights, once.

 

Do you have your side mirrors set to automatically fold when you lock your car? If so, and they fold with the first push your doors are locked. That's how mine works. The second push is the error warning, like mine.

Maybe your sounder is beeping only once because it's getting old and tired and needs to be replaced, like mine was.

On second thought, I think you need a new battery!

 

Yes, they fold when the doors lock. No flashes and no sound, other than the mirror motors. Same with my F150; Doors lock on first push, lights and one beep on second push.

 

If hearing the beep after the second push assures you that your car is locked, that's fine - but your car is already locked after the first push. You can test that it's locked after the first push by putting the key in your house at least 20 feet from your car and then going back out and try to open the door.

The second push is unnecessary. It's like wearing a belt and suspenders. You don't need both, but it's OK if it stops you from worrying about losing your pants!

 

I think UK cars work a little differently. In the UK the first push locks the doors as you say. The second push however activates the deadlocks which prevent the doors from being opened from the inside of the car. This is an additional security measure which means that if someone breaks a window they can still not open the car doors. I believe that in the USA this deadlock feature is banned on some sort of safety grounds.

Here is the relevant page from my car's handbook.

 

I get no beep at all unless there is a door, hood, or trunk open when I try to lock the car. Here's how mine works..... I push the door handle when locking the car. The mirrors fold in, I hear the doors lock, and the lights flash one time. If I hit the door lock again (or fob switch) I'll hear the doors lock and the lights flash once. There is NO beep. As mentioned, I will only hear a beep if a door, trunk, or hood is left open not allowing me to lock and arm the car. Is mine working properly?

 

Yes. The beep is the error message. Try pressing the button rapidly twice and see if it beeps. That's how my 2009 works, but it might have been changed beginning with the 5.0L models in 2010.

 

That's exactly what I explained in my post #28, above.

 

So you did! And that is indeed how it works! Sorry, IDK if I misread your post, or didn't even read it at all maybe, but yes, in the UK (and maybe in Europe as a whole) we have double locking (or deadlocking as we sometimes call it here) and in the USA you don't. Seems though that Jaguar enabled the double locking 'action' on the keypad even though no actual double locking takes place. And this has been the source of confusion it seems.

The most important takeaway from this, I think, is that it is important to lock the car, whether a single lock or a double lock, in order to enable all the systems to shut down properly. I don't think I have ever had a car as complex as the XKR - something to learn almost every day!

 

Yes.......If I press it twice rapidly it does beep on the second press....

 

I found that (after 10 yrs) if I locked the doors I no longer had battery issues. Sits for several days without a problem. Just say'n
I put an OPTIMA yellow top in because that is what I use in my truck fleet and has the best load and life. And NO BODY works on my car but me. I tried to have it serviced, what a joke.

 

Can someone explain the logic behind double locking a door? Why would you prevent anyone from getting out of the car? Serious question. Is this a child safety thing? Had it on other cars but the control was from the drivers door and locked the rear passenger doors so kids could open but as soon as you opened the driver door, the doors unlocked. I don't understand the ability to use it via remote. Seems like a death trap.