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Just thought I would share as sometimes I have heard people refer to the "Charge-Max" bar gauge in the cluster as "Turbo charge air" or "boost." From what I understand, this bar gauge (which goes green) indicates when your alternator is charging the electrical system. As part of the battery management system and the electronically controlled alternator, in an effort to increase fuel economy (ie, reduce engine load) the battery management system will usually try to only charge the electrical system during decel/coasting (as this is free energy) and this will be most of the time you will see this bar graph go green while driving. If the battery management system senses a low main battery, then of course you will be charging all the time until the battery is back to an acceptable level. Then mostly charge during decel/coasting again.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
