Hi, has anyone had issues where the EPB stops working on Auto release method. The only way I can release the handbrake is by pressing the button with either the brake or gas pedal pressed. Ran an auto scan on vcds and no errors.

Previously changed the 12v battery (was 12.1v) as my cars 6 years old. Chanting the battery inadvertently resolved the issue and the handbrake started to auto release again. But 2 months on and suddenly the same problem. Battery currently at 12.8v but only 13.2v when the engine is at idle?? This drops to 12.9v under heavy load.... Can this be the cause (i.e alternator).

Any thoughts?