Lexus RX450h Questions

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i push the menu button for navigation and answer calls change radio to cd it stopped working my addresses doesn't come up or my i phone
my start push button has a hard time starting my car it takes a couple of time or 10-15 mins of trying, it's like my break pedal gets hard to push down to start, i have full power but does not say start, it just started happening it will also say key not detected, i just replaced the battery in the remote

my menu button stopped working as well at the same time i can not pull up navigation at all or answer calls when i hit the button
The noise is not predictable but occurs more on light braking. It sounds like a solenoid chattering from underneath the car. Could it be the ABS modulator? Last year the dealer bled the brakes and the noise disapeared for 6 months, but now the cold weather is here it has re-appeared. Some days it occurs a number of times and other days it doesn't occur at all. It seems to occur more during cold weather.
2011 Lexus R450h
just cap missing. How can I fix?
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