Our son and his family live about 30 miles away from us and when we visit the last part of the drive is a relatively steep hill . Every time we park in front of their house we notice the brakes ( I think) smell burning yet I am obviously not using the brakes too often when I am going up hill .The grade is relatively steep and it is about a 6 minute drive up the steep grade to their house .. By the way this is my second Kia Optima , My first was a GDI and this one is the hybrid .I noticed that burning smell on both cars .Thoughts or comments would be most welcomed