I noticed a "hot" smell, when I got out of my rig. I also thought burning breaks or something, but it didn't come back after that 1 time. It was on one of the more icy days that I drove slower than normal and was on the breaks more often, so I thought it was related, but may be related to the TOD as it was busy that day also. I wonder if the magnets that pull in the TOD get some oil on them and when they are used get hot (If they haven't been used for a while it would burn off, creating the smell). I guess I don't even know where they are located, or exactly how they work, so this might not be possible?