BenzWorld Junior Member
Date registered: Jul 2009
Location: Wakefield, RI
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Automatic battery charger wiring
As we get closer to winter here in the Northeast, decided to use one of those battery tender plus charging devices on my 86 560sl, so that the battery will stay fully charged over the cold winter months.
Since the battery is in the tightly fitting box in the trunk, I couldn't figure any easy way to hook up the charger by running the wires under the car and up into the battery box from underneath. I ended up running the wires by just opening the trunk, opening the panel that covers the battery, and taking the battery box lid off ( and leaving it loose on the top of the batttery after wiring the charger to the terminals ). I then realized I couldn't leave the trunk slightly open because the trunk light comes on and would cause a battery drain over time. So what I did is find a spot on the trunk rubber seal where i could lay the wire without damaging it, and close the trunk lid. This worked, and the unit is now working as planned.
The only slight hassle now is that when I want to run the car, I'll need to go into the trunk and reverse everything, which will take a little time. These charging units are designed with a short piece of cable that can be left attached to the battery, which can be removed from the charger wiring by a simple plug in .
Has anyone who uses these chargers figured out a better/simpler way of running the cable to the battery ?