This invention relates to novel carboxyl- or hydroxyl-substituted benzimidazole derivatives of formula wherein R1 to R6 are as defined in the description and in the claims, as well as physiologically acceptable salts and esters thereof. At least one pathway between at least one of the surfaces and through the interior is formed. The cabin facing portion of the sheet metal structural member is configured and arranged to form at least a first bar portion of an integrated child seat tether anchor that is arranged and dimensioned to receive a child seat tether clip.