Why can't you just put a remote starter cutoff switch on the car or a toggle switch on the starter wire.
Simple, and battery stays connected.
Or why not just pull the coil wire from the distributor?
There are much better ways of disabling a car than the battery.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.