Transmission Fluid Leaking problems of the 2014 Cadillac SRX

Incident occurred while contact (c) was backing Srx down the approx 40 degree upslope 100¿ long driveway curved at bottom. Surfaces were dry & it was sunny. C purchased Srx new (navigation, driver awareness & driver assist) in late 12/13. C &/or spouse have backed Srx down driveway without incident 100 plus times. C & spouse entered Srx, adjusted seats & mirror, & buckled seat belts. C depressed brake pedal & pushed start button. While retaining pressure on brake, c shifted transmission selector into r, ¿reverse. ¿� the back-up camera display appeared. Immediately, Srx began to roll down driveway. Rolling continued despite increasing brake pedal pressure exerted. C was standing on brake pedal to get Srx to respond to full stop. Viewing the back-up camera display, c attempted to steer Srx so as to avoid entering street. Srx was stopped by impacting retaining wall on left side of driveway. Once Srx had stopped, c (with brake pedal still depressed) was able to shift gears & move Srx from driveway. C tested Srx by driving forwards & braking & noted no issues. Srx was dealer inspected. Dealer indicated that "could not duplicate concern. Checked for bulletins, no related bulletins. Inspected brake fluid for leaks, no leaks. No stored dtc's. " Srx's hill start assist feature, which holds Srx for maximum of two secs so driver may move from brake to accelerator without risk of rolling - feature does not function. Dealer verbally stated that on steep hills, Srx should be driven with two feet, one on brake & one on accelerator. For this report, c never used accelerator & never removed foot from brake pedal. C believes Srx should not have been at risk of rolling & brakes & transmission failed & should be investigated. Crash resulted in damage to left mirror, left chrome vent & left rear wheel well. Repair cost estimated at $980.