DIY · Source reviewSL550 R2302008 Mercedes R230 SL550 battery warning and charging-fuse replacementCPDay traced a warning that persisted after battery replacement by comparing charging readings and testing F52f1.Mercedes-BenzSLR230Chassis: R230Topics in the accountRed battery warningStarter-battery chargingF52f1 fuseBose subwoofer accessmbworld · CPDay