I recently bought a Lexus IS 300h 2014 model and wondering something is wrong with the parking brake.
My driveway is at an inclination, when I park in my driveway, I shift the lever to 'P' position and engage the foot parking brake. but the car moves by few inches despite of this when I take my foot off the brake pedal which lead me to think that foot parking brake is not being effective. I did a test to confirm my suspicion. This time, I engaged the foot parking brake, then shifted the lever to 'N' (neutral) and took my foot off the brake pedal and the car started rolling as soon as I lifted my foot off the brake pedal.
Previous to buying IS, I was using a manual car and that car did not roll over when in neutral gear with the parking brake (or handbrake) engaged. SO I definitely think something is wrong with the IS.
Before I send the car to a specialist, I want to hear from other users of IS and understand how they solved this problem.
As I bought this car from a Lexus dealer, it is covered by 12 months warranty. And at this moment I am assuming that the warranty covers this issue with the foot brake.