Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Welcome to OOF

Pages: [1] 2 3 4 5  All   Go Down

Author Topic: charging batteries  (Read 15789 times)

0 Members and 1 Guest are viewing this topic.

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39905
    • ML350 TDM SmartRoadster
    • View Profile
charging batteries
« on: 02 April 2020, 15:45:58 »
I'll ask here .... better chance of a reply rather than the MB's forum standard reply of take it to a dealer/indie.  ::)

If I wanted to use a CTek on my ML due to it standing more than normal, does anyone know if the auxiliary battery in the 'boot' get charged if I just connect the charger to the jumper connections under the bonnet? (starter battery lives under the driver's seat) Access to the aux battery requires dismantling of the boot liner/carpet.
I'm not really sure what the aux battery is for .... some suggest it's something to do with stop/start.  :-\
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30606
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: charging batteries
« Reply #1 on: 02 April 2020, 16:30:44 »
It provides power whilst the engine is off, saving the big battery for the big job ;)
Logged
Onanists always think outside the box.

Field Marshal Dr. Opti

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Utopia
  • Posts: 33043
  • Speaking sense, not Woke PC crap
    • View Profile
Re: charging batteries
« Reply #2 on: 02 April 2020, 16:54:15 »
My CLS 500 had a second motorcycle sized battery. Never quite sure of it's purpose. :-\
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30606
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: charging batteries
« Reply #3 on: 02 April 2020, 17:15:12 »
Quote from: Doctor Gollum on 02 April 2020, 16:30:44
It provides power whilst the engine is off, saving the big battery for the big job ;)
::)
Logged
Onanists always think outside the box.

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39905
    • ML350 TDM SmartRoadster
    • View Profile
Re: charging batteries
« Reply #4 on: 02 April 2020, 17:16:19 »
Quote from: Field Marshal Dr. Opti on 02 April 2020, 16:54:15
My CLS 500 had a second motorcycle sized battery. Never quite sure of it's purpose. :-\

That's what mine is like, though you can only just about see it if you remove the cover that accesses the back of the rear lights.
Not sure how long it would provide power ....  :-\

Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39905
    • ML350 TDM SmartRoadster
    • View Profile
Re: charging batteries
« Reply #5 on: 02 April 2020, 17:22:28 »
so ..... does the aux battery charge from the jumper points?  ::)
Logged

Field Marshal Dr. Opti

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Utopia
  • Posts: 33043
  • Speaking sense, not Woke PC crap
    • View Profile
Re: charging batteries
« Reply #6 on: 02 April 2020, 17:23:57 »
Quote from: Andy B on 02 April 2020, 17:16:19
Quote from: Field Marshal Dr. Opti on 02 April 2020, 16:54:15
My CLS 500 had a second motorcycle sized battery. Never quite sure of it's purpose. :-\

That's what mine is like, though you can only just about see it if you remove the cover that accesses the back of the rear lights.
Not sure how long it would provide power ....  :-\

The Germans think it fun to make them difficult to get at. :-\
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30606
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: charging batteries
« Reply #7 on: 02 April 2020, 17:31:44 »
Quote from: Andy B on 02 April 2020, 17:22:28
so ..... does the aux battery charge from the jumper points?  ::)
Christ no ;D AIUI, it keeps the climate control ticking over in REST mode and powers the radio. So apart from a couple of coolant pumps and a low blower speed, it doesn't actually need alot of power.

If I remember, I will have a look and see what WIS has to say about it.
Logged
Onanists always think outside the box.

Raeturbo

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • South Wales
  • Posts: 8350
    • TouregR5Mitsi Evo2. XJ8
    • View Profile
Re: charging batteries
« Reply #8 on: 02 April 2020, 17:46:33 »
Well if that’s the case what keeps the little battery charged then?  If you can get a multimeter on it check it when you have the other one charging.
Logged
Laying a rubber road.

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39905
    • ML350 TDM SmartRoadster
    • View Profile
Re: charging batteries
« Reply #9 on: 02 April 2020, 17:46:59 »
Quote from: Doctor Gollum on 02 April 2020, 17:31:44
Quote from: Andy B on 02 April 2020, 17:22:28
so ..... does the aux battery charge from the jumper points?  ::)
Christ no ;D AIUI, it keeps the climate control ticking over in REST mode and powers the radio. So apart from a couple of coolant pumps and a low blower speed, it doesn't actually need alot of power.

If I remember, I will have a look and see what WIS has to say about it.

I didn't put it very well. Jumper points are obviously connected directly to main battery .....  :y
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39905
    • ML350 TDM SmartRoadster
    • View Profile
Re: charging batteries
« Reply #10 on: 02 April 2020, 17:48:58 »
Quote from: Raeturbo on 02 April 2020, 17:46:33
Well if that’s the case what keeps the little battery charged then?  If you can get a multimeter on it check it when you have the other one charging.

That's what I was trying to avoid  ;)

https://www.youtube.com/watch?v=ATjTFgx2Yzs  :y
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39905
    • ML350 TDM SmartRoadster
    • View Profile
Re: charging batteries
« Reply #11 on: 02 April 2020, 17:49:37 »
I'll just use the car every other week  ;D
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30606
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: charging batteries
« Reply #12 on: 02 April 2020, 17:59:29 »
Logged
Onanists always think outside the box.

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39905
    • ML350 TDM SmartRoadster
    • View Profile
Re: charging batteries
« Reply #13 on: 02 April 2020, 18:12:37 »
Quote from: Doctor Gollum on 02 April 2020, 17:59:29
https://forums.mbclub.co.uk/threads/auxiliary-battery.200744/

I've seen that before, but some Mercs seem to have some kind of large capacitor instead and the web has conflicting info
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30606
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: charging batteries
« Reply #14 on: 02 April 2020, 18:16:02 »
The facelift cars clearly have it in a different place too... Early cars GL have it under the right front seat behind the battery... Just to help ;D
Logged
Onanists always think outside the box.
Pages: [1] 2 3 4 5  All   Go Up
« previous next »
 

Page created in 0.01 seconds with 18 queries.