Check the body code and seal position explicitly. Compare profile, length and fixing details rather than relying on the 123 family name.
Check the production series and body style, then record the engine and transmission details. Saloon W123, estate S123 and coupé C123 are distinct body applications. Compare the fitted component with the product's stated application before ordering.
Compare the complete number, including any suffix, and check the listing's applications, dimensions and mounting details. If the car has been modified, identify the fitted component as well as the original vehicle specification.
Read the individual condition label and description, and review the photographs for storage marks, wear or missing fittings. Check whether the price covers one item, a pair or a set; condition and quantity are product-specific.