Cruise Control problems of the 2015 Subaru Outback

Cruise control (cc) caused what I thought at the time of the incident was unintended acceleration. Operation of cc is different from any cc I used in the past. The cc was already engaged and I was going about 40 mph on a highway. I decided to increase my speed, so I pressed the 'set +' button. After a couple of seconds when I reached 43 mph, I released the button. The car continued to accelerate to 70 mph. Luckily the highway was empty and I was able to disengage the cc. The problem is that the cc 'set +' (and 'set -') has 2 positions - pushing it half way increases your speed like a traditional cc, and pushing it all the way actually increases the set speed of your cc by 5 mph increments. Hence when I thought I was just accelerating to 43 mph, I was actually setting the cc speed to 70 mph. One of the option packages with the car adds this 5 mph increment 'feature'. The quick reference guide and the regular manual do not mention this 'feature' - it is only mentioned in one of the auxiliary manuals for the option package. I think under different circumstances that this incident could have turned out much worse than it did. The cc does not work like traditional cc, and the controls look like a traditional cc.

Cruise control: when the cruise control (+/-) toggle switch on the steering wheel , which is used to set or change the speed setting of the cruise control, is pressed down to the ¿minus� or ¿set� side, it intermittently and in variable conditions either does not react at all (I. E. No change to the speed setting), flashes the speed setting on the screen display, but does not change it or more importantly it increases the speed setting and in some cases has caused the vehicle to accelerate while the driver is attempting to decrease the speed setting of the cruise control.