A marketplace listing promises a feature missing from the model documentation

If a buyer selects a product using a marketplace description but the delivered model's instructions omit the disputed feature, both versions of the information should first be preserved. The listing may have changed, or the manual may concern another variant. Examination should distinguish actual product characteristics from the description offered when ordering. A feature being absent from a short manual does not by itself prove that the product lacks it.

What needs to be clarified

The task could compare model identification, advertised characteristics and the possibilities for checking them on the submitted item.

Materials to prepare

A preserved listing with its date, page address and selected variant.
Order records, packaging, markings, instructions and information about supplied accessories.
The product, identifier photographs and the circumstances of any feature checks already performed.

What to compare

Whether the description concerns the ordered and actually delivered variant.
How the disputed feature is defined and whether operating conditions are specified.
Which observations are supported and which need agreed testing and suitable equipment.

Possible outcome of the analysis

A possible output is a comparison table of advertised and established characteristics, discrepancies and a testable technical question, separate from any legal assessment of advertising.

Limits of the conclusions

Destructive checks undertaken independently may alter the item. Examining characteristics does not automatically establish seller misconduct or guarantee a refund; preservation of the online description is assessed separately.