I recommend you purchase a brand new lead acid battery, and an acid container, and store the liquid from the battery in the container. Then no matter how long you have to store the car, you have access to a solid 12V battery.

The w123 and older vehicles have analog mechanical gauges and manual seats and windows were available. ( I've got a true euro 300D 4 speed with manual everything for sale, needing very little to be roadworthy...)

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!