Oh okay well good to know lol :)
"like a sunbeam" - it is used to give deeper meaning and description to what her face looks like in person so the reader can feel as if they are standing in front of her seeing that face.
Answer:
To convince readers to come to this garage sell.
Explanation:
There are keywords all within the sentences closer to the bottom of the paragraph, as such this is meant to persuade someone to do something that might or could benefit them. Such as, <em>No driving all over town, no getting lost on unfamiliar streets. Save money, save time! </em>