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Author Topic: Jump Start Booster  (Read 1227 times)

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Doctor Gollum

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Re: Jump Start Booster
« Reply #30 on: 27 March 2021, 19:44:37 »

Seems to be pretty much the current industry standard on medium and heavy duty trucks. Even Transhits have two full batteries here.  ;)
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Broomies Mate

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Re: Jump Start Booster
« Reply #31 on: 27 March 2021, 21:26:16 »


Does it have Stop/Start?

It does! And I think it's something to do with that ....

It's definitely to do with that.  :y
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Andy B

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Re: Jump Start Booster
« Reply #32 on: 28 March 2021, 19:15:00 »


Does it have Stop/Start?

It does! And I think it's something to do with that ....

It's definitely to do with that.  :y

but that alone or something else too? If I sit with the ignition at auxiliary with 'thing's on eg wipers, heated seats, radio, heater fan  ... are they supplied by the big starter battery under my seat or the baby battery in the back? I wouldn't imagine the baby battery would last very long.  :-\ :-\
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Re: Jump Start Booster
« Reply #33 on: 29 March 2021, 19:12:16 »


Does it have Stop/Start?

It does! And I think it's something to do with that ....

It's definitely to do with that.  :y

but that alone or something else too? If I sit with the ignition at auxiliary with 'thing's on eg wipers, heated seats, radio, heater fan  ... are they supplied by the big starter battery under my seat or the baby battery in the back? I wouldn't imagine the baby battery would last very long.  :-\ :-\

All I remember on the W251, the Aux battery solely used for the S/S system.  Something in the back of my head is saying it will also allow the transmission to move from Park to Neutral in event of a main battery failure..... although that could be S-Class only.  :-\
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Re: Jump Start Booster
« Reply #34 on: 29 March 2021, 19:30:10 »

...
 Something in the back of my head is saying it will also allow the transmission to move from Park to Neutral in event of a main battery failure.....  ...

That could be useful  :)
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Nick W

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Re: Jump Start Booster
« Reply #35 on: 29 March 2021, 19:39:03 »

...
 Something in the back of my head is saying it will also allow the transmission to move from Park to Neutral in event of a main battery failure.....  ...

That could be useful  :)


Useful seems to be against Mercedes principles; I've struggled with lots of transmissions that did all sorts of curious design decisions. The FWD autos shift back into neutral after a few seconds if the engine isn't running. I saw a number of E-class that wouldn't shift out of Park if the engine wasn't turning, which makes moving a non-runner interesting. They stopped using manual park releases nearly 20 years ago, and you can't even crawl underneath and disconnect the mechanical selector because they're all electronic.
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Re: Jump Start Booster
« Reply #36 on: 29 March 2021, 21:27:23 »

Mine still has a mechanical connection between the lever and the shift switch. It also has a cable interlock to stop the lever leaving park if the key is removed and the key from being removed if it isn't in park. That's obviously on top of the electrical interlock that won't release the lever if the brake pedal isn't pressed. This only works with power.

So if you don't have the key, and/or the battery is flat doing anything without a fork lift starts to look alot like work ::)
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Re: Jump Start Booster
« Reply #37 on: 29 March 2021, 21:47:12 »

....
So if you don't have the key, and/or the battery is flat doing anything without a fork lift starts to look alot like work ::)

I wish I'd taken more notice now, but at Mercedes, they'd just unloaded a dead car with a remote controlled vehicle lift. The driver said it was just about the only way to retrieve dead cars from multi-storey car parks where they can't get the recovery vehicle to the stranded vehicle.
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Re: Jump Start Booster
« Reply #38 on: 29 March 2021, 22:03:59 »

Judicious use of wheel dollies and a winch from some of Nick Ws recollections ;)
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STEMO

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Re: Jump Start Booster
« Reply #39 on: 29 March 2021, 22:14:46 »

Mine still has a mechanical connection between the lever and the shift switch. It also has a cable interlock to stop the lever leaving park if the key is removed and the key from being removed if it isn't in park. That's obviously on top of the electrical interlock that won't release the lever if the brake pedal isn't pressed. This only works with power.

So if you don't have the key, and/or the battery is flat doing anything without a fork lift starts to look alot like work ::)
Exactly the same as my astra.
But I think there's a release tab under the selector cover.
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Re: Jump Start Booster
« Reply #40 on: 29 March 2021, 22:28:40 »

....
So if you don't have the key, and/or the battery is flat doing anything without a fork lift starts to look alot like work ::)

I wish I'd taken more notice now, but at Mercedes, they'd just unloaded a dead car with a remote controlled vehicle lift. The driver said it was just about the only way to retrieve dead cars from multi-storey car parks where they can't get the recovery vehicle to the stranded vehicle.

It was something like this

https://www.youtube.com/watch?v=pZDqO1l9ItQ
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Re: Jump Start Booster
« Reply #41 on: 29 March 2021, 22:44:05 »

Mine still has a mechanical connection between the lever and the shift switch. It also has a cable interlock to stop the lever leaving park if the key is removed and the key from being removed if it isn't in park. That's obviously on top of the electrical interlock that won't release the lever if the brake pedal isn't pressed. This only works with power.

So if you don't have the key, and/or the battery is flat doing anything without a fork lift starts to look alot like work ::)
Exactly the same as my astra.
But I think there's a release tab under the selector cover.
If only ;D

I forgot, for good measure, Mercedes saw fit to bond the selector with the key, ignition barrel and engine ecu. Which is nice. Until one of them breaks ::)
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Re: Jump Start Booster
« Reply #42 on: 29 March 2021, 22:52:44 »

....
So if you don't have the key, and/or the battery is flat doing anything without a fork lift starts to look alot like work ::)

I wish I'd taken more notice now, but at Mercedes, they'd just unloaded a dead car with a remote controlled vehicle lift. The driver said it was just about the only way to retrieve dead cars from multi-storey car parks where they can't get the recovery vehicle to the stranded vehicle.

It was something like this

https://www.youtube.com/watch?v=pZDqO1l9ItQ
Oh how I'd love one of those when people park all over the place here. You could hardly do it on the quiet though  ;D
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Re: Jump Start Booster
« Reply #43 on: 29 March 2021, 23:17:54 »

....
Oh how I'd love one of those when people park all over the place here. You could hardly do it on the quiet though  ;D
;D ;D ;D
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Re: Jump Start Booster
« Reply #44 on: 29 March 2021, 23:36:08 »

Impressive 8)
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