Heat oven to 350 degrees F. grease (or lightly spray with cooking spray) & flour* bottom only of 13x9x2 rectangular pan.
With an electric mixer, beat cake mix, water, oil and eggs on low speed for 30 seconds, then on medium speed for about 2 minute, scraping bowl as needed (do not overbeat).
Remove baked 1/2 of cake from oven and pour about 1/2 to 3/4 of jar of hot caramel over the cake.
Tilt pan so caramel is evenly distributed over the layer.
Sprinkle about 1 cup of chopped pecans in an even layer over the caramel.
Sprinkle 1/2-3/4 of the bag of mini chocolate chips evenly over the caramel.
Do no stir or disturb layers of caramel/pecans/chocolate chips while evenly distributing remaining batter.
Sprinkle remaining pecans and chocolate chips over top, and drizzle with some of the remaining caramel.
*Instead of Flour, dust bottom of pan with the some of the cake mix