2013 300. Brake pedal is high & normal braking is excellent. Just pulled wheels & lubed caliper slides. Problem: When slowly going up my steep driveway & I stop, the brake pedal appears to have no vacuum & goes down about an inch or so & feels like it's hitting metal. When I take my foot off the pedal, the car is stopped on the hill & after a few seconds, the brakes "release themselves" & the car starts to roll backwards. Besides that, when first driving in the morning, for about the first 1/2 mile, I also have a similar situation where there is low vacuum & inferior stopping ability. After a mile or so of driving, all is fine. Any ideas?

 

Is it still under warranty? If so, take it to the dealer and let them fix it.

 

Car has 40K. Do u think it would fall under 5/100K?

 

I don't know, but since it's a safety item, it's certainly worth pursuing. It might be a check valve in the power brake reservoir, which is a very quick and cheap fix. We had a similar problem of no brakes on start-up with my wife's Mercury Mariner. The check valve took about 5 minutes to replace. Part cost was less than $10.

 

Turns out car has HSA....Hill Start Assist. Prevents car from rolling back when on a hill & u take ur foot off the brake. Can be turned on & off on control panel under Settings.

 

vega43,

This is an interesting feature however can take some getting used to especially if you've never driven a vehicle with HSA.
Did you decide to leave it on or deactivate?

 

[QUOTE=ChryslerCACares;83966]vega43,

This is an interesting feature however can take some getting used to especially if you've never driven a vehicle with HSA.
Did you decide to leave it on or deactivate?[/QUOTE. I've shut it off

 

[QUOTE=vega43;83968]vega43,

Certainly an interesting/functional feature but definitely for everyone.
All the best !!