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Kicking Tires, a branch of Cars.com, compared the sales of the three models in September, to the month of August. August is the time when automakers throw in hefty incentives to clear out the models in preparation for its successors in the month coming up. The 2008 Cadillac CTS gained a 73.5% increase in September over the sales of the 2007 CTS in August. The 2008 Honda Accord faired a 31.2% increase in September over the 2007 Accord in August. The 2008 Mercedes-Benz C-Class also gained a 31.2% increase in September over its predecessor in August.
[Source: Kicking Tires]