GOTHENBURG, Sweden, Nov 24 (Reuters) - Sweden's AB Volvo, the world's second biggest truck maker, expects to raise prices next year to compensate for a weaker dollar and higher costs for raw materials, its chief executive said on Wednesday. "I think we will need to raise prices in 2005 like we did in 2004," Volvo CEO Leif Johansson said on the sidelines of a conference.