In Android Auto: When browsing through album titles, it would be nice to be able to scroll up to the previous letter. Sometimes a title is alphabetically closer to the beginning of the next letter than the beginning of its own letter.
For example: Today I was looking for “Trans-Europe Express,” and I had to scroll through pages and pages of other albums with T titles (mostly starting with “The”), and endure several “safety pauses” before I reached what I was looking for. It would have been easier to start in U and scroll up than to start in T and scroll down.