Why won't my 2002 Clk 430 crank and shift into drive? It was in a minor accident.

Depending on the amount/location of damage to the vehicle you could have damaged the wiring harness leading to blown fuses, or damaged important sensors/relays that, if damaged, wont allow the vehicle to start. or you could have tripped the rollover switch which cuts the power to the engine in the event of a rollover to help prevent fires. but can be set off if damaged or hit hard enough. Start checking fuses and wiring on the damaged part of the vehicle. I hope this info helps.