Final answer:
The alert/warning symbol for manual transmission varies depending on the car manufacturer and there is no universal symbol for it.
Step-by-step explanation:
The alert/warning symbol for manual transmission depends on the specific car manufacturer, and there is no universally recognized symbol for it. In some cases, a symbol depicting a gear shift with an 'M' or 'MT' may be used to indicate a manual transmission. However, this is not consistent across all vehicles, so it's important to refer to the car's user manual or seek assistance from the manufacturer to accurately identify the manual transmission symbol.