On 9/2/21 I took my 2014 Chrysler 300 to Shepherd Chrysler Service Department in Auburn, Indiana. The problem I was experiencing was cold air blowing out of the driver's side car from my heating/cooling system. We believed that the problem may have been a bad door actuator. I purchased a part and took it to Shepherd's where the repair was going to be made. After a Chrysler Certified Mechanic examined my car, he told me that the left door actuator had been previously replaced and he noticed (without completely removing everything) some suspected damage to the housing from previous replacement of left actuator. He stated that he didn't want to replace the main door actuator in case something was wrong with it. I was given a verbal estimate of $1500 to repair the problem. No repairs were made at the time and I was charged $126 for the technician to diagnose the problem. I left the dealership and upon entering the inter-state I noticed a problem with the car -- shaking and sluggish response when trying to accelerate. I soon discovered there was a problem with the brakes, when I attempted to brake to avoid hitting the vehicle that cut in front of me. I was able to switch lanes, avoid a serious collision which could have resulted in injury or possibly death. When I was able to exit the expressway I examined my gas and brake pedal to find out why I was unable to brake and discovered that the service technician had failed to complete the job and put things back where they belonged. His negligence put me at great risk! I used my cell phone to record the mess left behind by the Chrysler Certified Mechanic at Shepherd Automotive. The dealership was contacted that day about the problem. I have heard nothing since that time and would like to file a complaint about the mechanic who worked on my vehicle, and the dealership, who has failed to resolve this problem. Lindsay McLain [protected]