Battery Disconnect-tools always needed? - Mercedes Benz SLK Forum

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#1 Old 09-09-2013
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Battery Disconnect-tools always needed?

I have no idea how to disconnect my battery [no, I don't need to and I'm not experimenting with any mod] but I thought if there were anything basic I should know what to do, I would imagine it would start with disconnecting the battery. So, I head to youtube [shivers] and find this..is it accurate?



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#2 Old 09-09-2013
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Always disconnect the negative lead (black or brown) first - this is earthed to the body, so if your spanner (wrench) slips, it won't short out and melt the wrench and ruin the battery - which can happen if you try and disconnect the positive first.

Also, when reconnecting, connect the positive first. When connecting the negative, do it in one firm, deliberate movement - if you are hesitant about it, it can generate sparks (and subsequent electrical 'spikes' ), which the on board electronics don't like.






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#3 Old 09-09-2013
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I've installed one of these , makes disconnecting quick , safe and very easy !

http://www.ebay.co.uk/itm/2308250557...84.m1439.l2649
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#4 Old 09-09-2013
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Quote:
Originally Posted by curro101 View Post
I've installed one of these , makes disconnecting quick , safe and very easy !

http://www.ebay.co.uk/itm/2308250557...84.m1439.l2649
Also make excellent anti-theft devices. If you're using one on an R170, don't forget to turn the steering wheel two full tuns from lock to lock after reconnecting.



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#5 Old 09-09-2013
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I have one on the r171 for the " battery resets " , funnily since I put it in , haven't needed it , and also on my BMW that sits for long periods , that way I know the battery will be the same as I left it , no need for trickle charging !
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#6 Old 09-09-2013
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Quote:
Originally Posted by curro101 View Post
I have one on the r171 for the " battery resets " , funnily since I put it in , haven't needed it , and also on my BMW that sits for long periods , that way I know the battery will be the same as I left it , no need for trickle charging !
Could you explain please what it's purpose is? Reading that ebay ad is like german to me.


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#7 Old 09-09-2013
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Also make sure you have your radio code or you will be going to the Mercedes Dealer with prof of owner ship to get the code. It has to be reset after you have disconnected the battery.
Number 10 mm socket or wrench should be the size you need to disconnect the terminal.


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#8 Old 09-09-2013
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You remove the negative from your battery and put this item in its place , you then connect the negative to this !
Disconnecting/connecting the battery is then just a matter of turning the black wheel one way or the other !
It's of a very solid construction and there's no sparking at all , when used !
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#9 Old 09-09-2013
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Curr that's brilliant! I'll have to find one on the us ebay or the local parts store.

Ray-I no longer have the factory radio-would this matter? I would think not.


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#10 Old 09-09-2013
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Most aftermarket radio nowadays do not have security codes. So, it would not.
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#11 Old 09-09-2013
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Quote:
Originally Posted by slk320chick View Post
Curr that's brilliant! I'll have to find one on the us ebay or the local parts store.

Ray-I no longer have the factory radio-would this matter? I would think not.
Something like this ??

http://www.ebay.com/itm/BATTERY-MAST...0c5105&vxp=mtr
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#12 Old 09-09-2013
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When disconnecting the battery,
make sure the car is turned off & do not leave the key in the ignition.


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