12V only when the engine is running

12V power supply only when the engine is running?

Hello everybody,

When configuring our MP Activity, we came across the cut-off relay, which seemed interesting to us, so that the starter battery is not drained from other consumers (almost everyone has experienced it ...). We were told that the 12V doses in the Activity by default only carry current when the motor is running. Is it really like that? or new? What do you do with cool boxes? You can change that, but what's the nonsense? Does anyone have any experience?

Best answer on the topic

No problem:

The additional battery enables external builders to access a battery that is independent of the on-board network for various retrofitting. This comes primarily from the Sprinter series. The MarcoPolo is already fully used. With all Vito, V-Class and Activity this has no function. In a few weeks (hopefully) the additional warm air heating will run over it. Then that makes sense. Or someone would like to plant their own (camping) fixtures or just connect the standard 12V sockets or have the opportunity to give themselves jump start (that works!). But as I said, there is nothing to do with it ex works. It's just an option, you don't have to configure it.

I hope I could shed some light on the dark?

greeting

Befner

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32 answers

That's true with my Alhambra 2011, it works like this. Electricity is only available when the engine is running, and now with V-220, too.

Makes sense ... otherwise the battery runs out quickly and you look stupid when you want to drive off;)

The 12V supply goes from ignition position "1", so the engine does not have to be running. NOTHING is (currently) connected to the factory second battery when the vehicle arrives. Then you can simply reconnect or retrofit the 12V sockets.

greeting

Befner

Quote:

@Jot_ti wrote on January 19th, 2015 at 11:03:55 am:

Hello everybody,

When configuring our MP Activity, we came across the cut-off relay, which seemed interesting to us, so that the starter battery is not drained from other consumers (almost everyone has experienced it ...). We were told that the 12V doses in the Activity by default only carry current when the motor is running. Is it really like that? or new? What do you do with cool boxes? You can change that, but what's the nonsense? Does anyone have any experience?

-:)

Of course that’s nonsense what you’ve been told!

The 12V socket at the front of the dashboard carries electricity when the ignition is on.

In your case, the rear 12V sockets of the MP are supplied by the additional gel battery and they also work when the vehicle is stationary. As a result, it would not be possible to empty the starter battery!

-:)

Greeting

Nico

Can I understand the two statements above to mean that this is the difference between the V-Class and the MP Activity for the second battery (sockets connected to the rear or not)?

I repeat: from the factory NOTHING is currently connected to the second battery, not even the 12V sockets at the back! Neither with the Vito, nor the V-Class, nor the MarcoPolo Activity!

Only with the CORRECT MarcoPolo with a kitchenette is it different with the second battery ...

That's why it's also called: Additional battery for RETROFITTING consumers. Retrofit is not original!

greeting

Befner

Sorry, but could you please explain briefly to an unsuspecting person what this 2nd bat is for. then there is, you don't go for a completely pointless walk, do you?

Missed it and couldn't find it on the net ...

Thanks !

No problem:

The additional battery enables external builders to access a battery that is independent of the on-board network for various retrofitting. This comes primarily from the Sprinter series. The MarcoPolo is already fully used. With all Vito, V-Class and Activity this has no function. In a few weeks (hopefully) the additional warm air heating will run over it. Then that makes sense. Or someone would like to plant their own (camping) fixtures or just connect the standard 12V sockets or have the opportunity to give themselves jump start (that works!). But as I said, there is nothing to do with it ex works. It's just an option, you don't have to configure it.

I hope I could bring some light into the dark?

greeting

Befner

I'm a little confused now! When I placed my order, I asked my friendly friend if the auxiliary heater runs on an additional battery, he told me that there was no additional battery, so I did without the additional heater.

I had one in my last Vito and because of the short distance I drove every morning, the battery soon ran out and I had to bike! Brrrrrrr, cold ;-)

Quote:

@Befner wrote on January 20, 2015 at 8:53:40 pm:

No problem:

The additional battery enables external builders to access a battery that is independent of the on-board network for various retrofitting. This comes primarily from the Sprinter series. The MarcoPolo is already fully used. With all Vito, V-Class and Activity this has no function. In a few weeks (hopefully) the additional warm air heating will run over it. Then that makes sense. Or someone would like to plant their own (camping) fixtures or just connect the standard 12V sockets or have the opportunity to give themselves jump start (that works!). But as I said, there is nothing to do with it ex works. It's just an option, you don't have to configure it.

I hope I could bring some light into the dark?

greeting

Befner

Hello Befner, hello V-drivers

I would like to operate a compressor cooler using the additional battery.

How do I know whether the additional battery is installed in my V250 Avantgarde Edition?

And what do I have to do so that the 12V sockets in the passenger compartment are supplied by the additional battery?

Does the additional battery also provide power when there is no ignition key?

Thank you for your support.

Kind regards

Wiesnwiesel

If you have ordered the additional battery, it is inside, if not you can safely retrofit it if the space under the driver's seat is not occupied by anything else.

With the additional battery, you automatically get a cut-off relay so that you don't also draw power from the 1st battery. The second battery is the same size with 95Ah, so your cool box can run for a long time.

The sockets in the passenger compartment are fused with 40A in the fuse box on the passenger side. If these are to be supplied by the second battery, you have to pull a line across the footwell at the front. It would of course be easier to install a socket, fed directly from the additional battery.

Of course, if you tap directly on the battery, you always have juice. I installed a time relay for all rear sockets so that the sockets still have electricity for a defined time after the ignition key has been removed.

By the way: If the main battery is weak, you can also tell from the fact that start - stop no longer works.

Picture at: http://www.motor-talk.de/forum/moebel-fuer-den-mpa-t5317162.html second page

greeting

ATBM

Hi,

I have explicitly not ordered a second battery, but is it possibly included when you have ordered the additional hot water heater?

With best regards

Triple-M

So far (for 30 years) I've always tinkered them in myself. Now it was in the configurator (Vito)

I do not believe that you have the additional battery installed because it does not even appear in the V configurator.

Just open the cap under the driver's seat. The battery cannot be overlooked. In addition, the thick pole comes towards you. Isn't Mr. Burmester under the driver's seat at the V?

But, as I said, retrofitting must be possible if there is space.

(If at MB Personenwagen they don't do that, go to MB Transporter, that's probably day-to-day business)

greeting

ATBM