Identify what is actually present
Ask whether the towbar is fixed, detachable or retractable, and inspect only what is safely accessible. If it is detachable, check that the relevant removable part and any required key are included. Do not assume that an advertised preparation package includes a fitted towbar.
Ask about installation
Find out whether the equipment was fitted originally or added later, and request the installation information the seller holds. Ask about the electrical connection and how it is intended to be used. A socket that looks complete does not prove correct wiring or compatibility.
Keep towing limits separate
Do not calculate permission to tow from a badge, an engine description or the towbar's appearance. The vehicle, trailer, load and applicable rules all need to be considered. Have the permitted limits and compatibility checked for the exact combination before towing.
Avoid improvised tests
Ask for a demonstration of the mechanism in accordance with its instructions, with the car safely parked. Do not crawl beneath an unsupported vehicle or attach an unfamiliar trailer to test the equipment casually. Record missing parts and unresolved questions, then use a qualified professional where necessary. A clear equipment checklist helps you ask better questions; it is not a statement that the car is ready or authorised to tow your trailer.