The Europa S2, or Type 54, was introduced in April 1968. It used the same Renault engine as the Type 46, but offered a number of refinements, including electric windows, fully adjustable seats, a new interior, and a polished wooden fascia for the dashboard. Per request of the automotive insurance industry, Lotus switched to bolt fasteners (instead of resin bonding) to attach body to frame. A small number of Type 54s were modified to be "federalized", that is, made suitable for export to the United States. The Federal Type 54 was slightly modified. They were actually recalled because of the headlamps being too low (a "bug eye" headlamp raiser was to be installed). The Federal 54 had the low fenders of the European 54, but larger engine of the type 65. Perhaps 200 of these were made.
Source: Wikipedia (original)