Final answer:
When in doubt about the suitability of jacking points on a vehicle, always consult the vehicle service information or seek professional help to ensure safety and avoid vehicle damage.
Step-by-step explanation:
If you have doubts about the suitability of the jacking points on a vehicle, the safest and most professional step to take is to consult the vehicle service information. This documentation provides the manufacturer's recommended locations for lifting the vehicle safely. Using the wrong jacking points can lead to damage to the vehicle, or worse, a dangerous situation where the vehicle could slip or fall.
Pushing against the selected jacking points with your hand is not a reliable test of strength or suitability, nor is gently tapping them with a hammer. It's important to follow the manufacturer's guidelines to ensure the safety of both the vehicle and the person performing the work.
If the service information is not available, it is advised to seek professional help rather than risking using a questionable jacking point. Vehicle repair manuals, dealership service departments, or certified mechanics should be able to provide the correct information regarding safe jacking points.