The average asking price for a used 2018 Mercedes-Benz SL 550 is $46,913, with 59,784 miles on average, across 12 cars for sale at U.S. dealers as of Nov 10, 2026.
Used 2018 Mercedes-Benz SL 550s for sale at U.S. dealers ask $46,913 on average (half ask less than $48,165), across 12 cars. The cars for sale have 59,784 miles on average: one with fewer miles is worth more, and one with more is worth less. To check one car's price against cars of its trim and mileage, enter its VIN in OttoQuest's free Deal Check.
The 2018 asks $46,913 on average with 59,784 miles; the 2017 asks $41,228 with 49,541 miles, and the 2019 asks $50,012 with 56,049 miles.
NHTSA lists 2 safety recall campaigns that cover the 2018 Mercedes-Benz SL 550. Repairs are free at a dealer of the make; check a car's VIN with NHTSA before you buy to see whether its recalls were fixed.
Used and certified cars for sale at US dealers, each car counted once. Days listed are the dealer’s own days on market where they publish it. Price moves compare the same cars at both ends of the window.
| $13,616 |
| 87,873 |
| 3 |
| 2007 | $20,182 | 70,237 | 9 |
