Recently slid into a fence durring ice/snow storm.

Sometimes if they get dust,dirt,snow or ice in them they won't "click".

check the top runner on the tailgate on the outside to see if damaged. if not that then check the molds around the gate

Sorry no idea iam not a bodywork man but couldnt you repair it with a tub of fibre glass ? Maybe try a scrapyard ?

you need to replace the wipers all together

Yes, you did.

Does it come on while you are driving in these conditions? If so it is letting you know it is enabling the traction control, which means it is deciding how much power to let you have when you press on the gas.

ther should be a steering wheel lock in the colum that engages when the vehicle is shut off . if you slid into the ditch and your wheels are turned or ther is a lot of presure on the wheels or colum then the lock wont disengage( the lock is jambed up because of the presure on it) try to remove the presure on the wheels and pull opposite on the steering wheel. if you get rid of enough presure on the lock it should turn again

NO ITS NOT COMMOM FOR YOUR CAR BUT IF THE IMPACT IS JUST HIGH ENOUGH AND WITHIN 30 DEGREES OF THE CENTER OF THE CAR AND OVER 15MPH IT WILL DEPLOY

Fuel pump is located inside your fuel tank.Sometimes if you have involved in an accident there is automatic shut off switch that will kill the fuel pump operations and prevent fire durring accident.Chek your manual for fuel pump shut off switch. Sometimes is located in the Trunk or in front of vehicle on driver side under dash on left side panel.

Remove the wiper arm and check the serrated hub to see if it sheared a pin holding it to the shaft. If it is ok, then you may have a broken/loose part in the linkage. Good luck!