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BMW 5 Series vs Mercedes-Benz GLS: 5-year value retention (49% vs 49%), resale value, and cost of ownership head-to-head. BMW 5 Series holds its value better.
On five-year value retention the BMW 5 Series comes out ahead, holding about 49% of its value versus 49% for the Mercedes-Benz GLS. Over the first five years the BMW 5 Series loses roughly $30,916 while the Mercedes-Benz GLS loses about $46,118 — a gap near $15,202.
First-year drop is the biggest factor: the BMW 5 Series sheds about 0% in year one versus 9% for the Mercedes-Benz GLS. If you buy used, the steeper early drop is what the original owner absorbs.