SL55/63/65/R230 AMG: Onboard battery maintainer for both batteries
Has as anyone else done this? If so, wondering where you mounted the unit and how you ran the wires. The leads to the batteries are 6 feet long, so I am thinking the unit should be central, perhaps under the passenger seat or in the cubby behind the seat.
The SLs have a rear convenience batter and front starter batter that are maintained through a battery control module located in the trunk near the convenience battery. You should most likely locate your battery tender in this location as you will only want to keep the convenience battery charged up. The battery control module makes sure that any convenience features (those not needed to start the car) come from the convenience battery.
Gary
Gary
+1 - never had an issue with starter battery on my 2007 SL55









