Every call to a workshop is roughly the same three questions: do you work on my car, how much, and when can you take it. A website that answers those stops the phone from eating your day.
Name the makes you service
A list of brands you actually work on cuts the wrong calls immediately and makes you findable for the searches that matter, because people search by make, not by "mechanic".
Publish a range, not a secret
You cannot quote a repair blind, but you can publish ranges for the routine jobs: oil service, brakes, diagnostics fee. Silence on price reads as expensive, and the caller hangs up and dials the next shop.
Let them book a drop-off slot
A simple form with car, problem and preferred day beats a phone number for anyone calling from an office. Those are the customers you are missing, not the ones already standing in your bay.
One photo of a clean bay is worth a paragraph
Drivers decide about care from how the shop looks. Show the workspace, the lift, the people. It answers the question they will not ask out loud.