Originally Posted by Jeremy5848

Plugging the battery into a trickle charger overnight not only keeps it topped off but also keeps it a little warmer than it otherwise would be, due to the waste heat generated in the battery as part of the charging process. Cold batteries have less energy than warm batteries.

If you can't plug in (battery trickle charger and/or block heater), consider keeping an extra battery in the house, connected to a trickle charger. When it's time to start, carry or wheel the battery out and jump the car's battery, then easily start the engine.

For a DIY on installing afterglow in your W124 car, simply and inexpensively, see this thread. Something similar could be done for the W123 and others.

Jeremy