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Audi S5-Cabriolet vs Mercedes-Benz S-Class: 5-year value retention (67% vs 47%), resale value, and cost of ownership head-to-head. Audi S5-Cabriolet holds its value better.
On five-year value retention the Audi S5-Cabriolet comes out ahead, holding about 67% of its value versus 47% for the Mercedes-Benz S-Class. Over the first five years the Audi S5-Cabriolet loses roughly $21,813 while the Mercedes-Benz S-Class loses about $63,721 — a gap near $41,908.
First-year drop is the biggest factor: the Audi S5-Cabriolet sheds about 7% in year one versus 10% for the Mercedes-Benz S-Class. If you buy used, the steeper early drop is what the original owner absorbs.