Was there a CNG kit, alloys, sound system installed??, if yes then most probably they would take out the accesories and park the car in parking lot, hospital parking or somewhere around the area, keep searching around in nearby places most probably they would have taken out the stuff and left the car there, hopefully u will find it as they wont get any money or ransom from an old mehran, or if not they may use it for terrorist activities, (i hope not).
Dont Lose hope,keep reciting Inalilahe wa ina ilaahe rajioon and keep looking around, police wont do anything much, keep a search and In sha Allah u will get ur car back