2016 PORSCHE CAYENNE Fuelpropulsion System Problems

car had a smell of gas diesel fumes inside cabin from air conditioning system. number of oil leaks over the years as well. now car at dealer for repair over 10 month. not fixed yet. number of problem with same diesel engine on line, even article i found . car was sold as CPO , it was new unregister, but they guaranteed us there will be no emission problems or leaking with this car. now warranty almost over Nov 2023 , and I will get a defective car back maybe... after warranty will expire! more importantly a car that leaks oil or diesel and smells inside the cabin from that.

When slowing almost to a stop, and then need to accelerate, such as slowing for a yield sign, then trying to merge, vehicle is non responsive to throttle input for at least a second, or more. This has put me and others at risk because I assume I'm going to be able to accelerate when pull into traffic and am not able to. The dealer has had the vehicle but was unable to reproduce. It does not always do it, there's some combination of engine, drivetrain or fuel management it's in that does this. I have disabled start/stop mode. There are no system messages or OBD errors. The dealer has said that others have experienced this and the manufacturer has told them it's "normal". It's a safety problem and I'm seeking help in getting the manufacturer to fix it. Note, I sent the attached letter to manufacturer and did not...

UPON COMPLETION OF MODIFICATIONS DUE TO VOLKSWAGEN/AUDI/PORSCHE 3.0L DIESEL EMISSIONS SETTLEMENT PROGRAM THE VEHICLE HAS AN INTERMITTENT DELAY WHEN ACCELERATING. THIS DELAY IS UNPREDICTABLE AND CAN BE SEVERAL SECONDS IN DURATION. ONCE ACCELERATION IS APPLIED IT IS TOO MUCH POWER AND AGAIN UNPREDICTABLE IN RESULTS. APPEARS TO BE RELATED TO OUTSIDE TEMPERATURE. OVER 80(F) IS WHEN MOST TROUBLESOME. WHEN CROSSING INTERSECTIONS AND ACCELERATING TO GET ON THE HIGHWAY IS WHEN THE SAFETY ASPECT IS OBVIOUS.PORSCHE HAS STATED THIS IS A NORMAL AFTEREFFECT FROM THE MODIFICATION AND MY VEHICLE IS WORKING WITHIN THE PARAMETERS SET FORTH BY THE CARB AGREEMENT.

CAR LOST ALL ACCELERATION AND ENGINE SHUT COMPLETELY OFF HAPPENS FREQUENTLY. CAR ON SEPARATE OCCASION SIEVED AND SHOOK VIOLENTLY TO A STOP ON THE ROAD MULTIPLE TIMES.