E60 M5 trickle charger

[n1ikosgi]

Hi all. I have now solved my 'car dilemma' by opting for a beautiful e60 M5 (and loving it).
I now have a boring question: I hope someone has an experience w fitting a trickle charger (neatly and direct to the battery at the boot -not the terminals at front). I used to have the same installed at the maser (http://www.amazon.co.uk/CTEK-CTE-MXS5-0-12V-Battery-Charger/dp/B004ZWV1JI/ref=sr_1_1?ie=UTF8&qid=1355230943&sr=8-1) and the techs had nicely fitted everything and left a small socket in the boot for me to plug the car in at the garage.
I have seen a post on how to fit it at the front, but I'd rather fit direct to battery..
Problem now is that I feel bmw are not so keen to have this done -at least not if I provide my just purchased charger.
Any ideas/suggestions of good garages in London welcome.

[Vixpy1]

Ctek through cigarette lighter

[n1ikosgi]

thx mate - thought cig lighter not hot when car off?

[Vixpy1]

Some are, I'm not entirely sure about the e60, both my Porsche and TVR charge this way and the ctek is fantastic

[phelix]

I think charging via the points in the engine compartment is the recommended way on the E60 otherwise the battery monitoring circuit gets well confused.

[n1ikosgi]

interestingly, the dealer i got it from said they fix it directly to the battery at the back. not 100pc he was an expert tho..

[phelix]

From the owner's manual (admittedly for a US spec car but can't see why it would be different) "Only charge the battery in the vehicle via the terminals in the engine compartment with the engine switched off."

[KTMboy]

I've fitted the lead/plug straight to the battery terminals and it has been fine for two years. Connect to the charger in the garage using the specified extension cable, and shut the boot lid down carefully. I leave mine for weeks on end. It did once trip the airbag warning light - but I'm pretty sure that's cos my wife tried driving off with it still plugged in - she flatly denies it to this day

[n1ikosgi]

thanx - i think its far more tidy-and potentially safer from a cable tear and wear pov- having it in the boot.