Case C-301/04 P: Judgment of the Court (Second Chamber) of 29 June 2006 — Commission of the European Communities v SGL Carbon AG, Tokai Carbon Co. Ltd, Nippon Carbon Co. Ltd, Showa Denko KK, GrafTech International Ltd, formerly UCAR International Inc., SEC Corp., The Carbide/Graphite Group Inc. (Appeals — Competition — Agreements, decisions and concerted practices — Graphite electrodes — Article 81(1) EC — Fines — Guidelines on the method of setting fines — Leniency Notice — Production of documents in a Commission investigation)