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      01-17-2013, 09:34 AM   #2
Delta0311
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Drives: 2011 BMW 335xi E92
Join Date: Apr 2009
Location: NJ

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Quote:
Originally Posted by MonsterM View Post
For those of you that used this setup. I am just about to upload my ECU file using the Simon tool for the AA tune. Please excuse some of the "noob" questions but I just want make sure I do not damage anything in the process. What is the best and easiest way to connect a battery charger? Is there a particular one I should use? Is it absolutely necessary to use a battery charger? Should the battery charger be connected during the entire process? Anything else I should look out for? I have been real busy lately and I have very limited time to do this. I really appreciate any input from you guys. Thanks in advance.
Yes you should use a battery charger because the tune process can go anywhere from 10-20min, so there is a good chance your car will cut power before the flash finishes.
You hook up the charger to the terminals under your hood. They are on passenger side, the + is covered with a red plastic tab and the - is just a metal rod connected to the side of the car. When you find the + terminal just look slightly below it and to the left, its connected to the body of the car.

Get this charger

http://www.bimmerzone.com/BMW_Access...110406881.html

DO NOT get the one that plugs into the car lighter port.
And shop around I was able to find the charger for a about $60 new.
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