Two weeks ago I would have only glanced at this post but after being stuck for nearly fours hours with a flat battery it's not funny. Went to a motorcycle event and left car unlocked so the others could get in, but ignition off and no radio on. Can only assume the opening and closing doors drained battery and when I tried to start, seat went forward but no ready light. Thinking it was just playing tricks got out locked and tried again, lights then flashed, alarms beeping but no start. Called Lexus assist and given an 70 minute wait, this increased every 15 minutes, then went to 4 hours after the first call. Someone came from home with jump leads and started it ourselves. Car in for a check, but they told me it will only give a flat battery code, no faults will show up.
Lexus customer service reply to my email is that they use the AA and have no control over there call outs !
A few things to be learnt
The car default is to lock all doors when battery flat, so keep one open.
Open bonnet at once so you can get to the jump start connections.
Keep a power pack with you at all times.
This is my first Lexus and really enjoy the car, but at times find it bewildering, I have had a sponge on fuel flap to keep it open, stood holding door handle trying to get in on cold days and now the battery !
Lastly I find it most upsetting that faults that you high light to Lexus Customer service are ignored, both the fuel flap and door handles I have had to request with my dealer after seeing solutions on here.