When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Do any of you know if it's normal to see the 12v battery status on App as partially charged even after coming back from a 30 min drive ....when should we see it at a fully charged status ?
From my experience with a 2022 43, it takes more than 50 miles of highway driving to charge the battery to a decent level; 30 mi. is not enough. I also see the battery level to go really low after 2-4 weeks of sitting undriven in the garage, esp. in winter--all these alarm and remote radio functions slowly drain the battery to the point that once, after a 4 week period, the battery was dead.
Because I drive relatively little, maybe 500 miles/mo, I periodically check the battery voltage with a multimeter and recharge to full capacity every couple of months or so, always after a longer period of rest. Here is a typical voltage vs SOC (%) chart for an AGM lead-acid battery; I keep it pasted on the wall of my garage.
I actually received a check engine with code P0A8D - 14 volt power module system voltage low error but it disappeared after a few starts.
Thanks for the input. So it's a common to see it at partially charged most of the time since i don't drive a lot and especially in winter.
The best approach is take it to the dealer and check for the latest sw updates: there are some patches that will prevent battery drain when ignition is off…
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.
