2015 Jeep Renegade - E-Brake off and on

The elctrnoid parking brake not working light goes on and car won’t start. Random times, but happenning more often. Then starts working. Today, i engaged the lock via the remote and unlocked 4 times in a row and then it started. They want to charge me 150$ just to put it on a diagnostic, but maybe you guys have seen this. Error: Electronic Parking break not working.

150.00 for a diagnostic is a reasonable charge . You don’t work for free and the mechanics don’t either.
I would guess that the dealer might be the best place to have this Electronic Parking Brake problem solved.