I have an 07 RX400h SE-L. When i drive it in cruise control at 70MPH on the motor ways no problems and it behaves. Last weekend i got a chance to drive it at 50MPH in cruise control on some A roads and this was probably the first time i did this at this speed. However every now and than the car would suddely accelerate for no apparent reason although it was set to 50 and i will touch the cruise control leavers.
Now if there was a hill, i would appreciate the car would need some more power to keep the 50MPH speed constant, but this was on a flat road. There is a US Lexus Official Service Bulletin for this (EG013-07), but my dealer has confirmed that this does not apply in the UK.
As this is first time it has happened i will try and replicate it again this weekend on some empty roads before taking it to the dealer so that i can be sure i can replicate the issue with him in the car.
Has anybody seen this on a 07 RX 400h?
Many thanks,
Rishi