2018 Mercedes-Benz Sl 450: Recalls, Problems & MPG
Here are the deets on the 2018 Mercedes-Benz Sl 450: 2 recalls, 1 owner complaint and up to 23 mpg combined.
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Recalls
2 vehicle recalls from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Airbags Vehicle recall #19V571000 · 2019 · 457 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling certain 2018 sl65 amg, 2019 sl63 amg and 2018-2019 sl450 and sl550 vehicles. The front passenger air bag May have been improperly sewn, allowing the seam to tear during deployment.
Why it matters: A tear in the air bag May decrease performance and increase the risk of injury.
The fix: Mbusa will notify owners, and dealers will replace the passenger air bag, free of charge. The recall began December 13, 2019.
Communication, Electrical Vehicle recall #21V058000 · 2021 · 1,292,258 vehicles
What's wrong: Please refer to the part 573 report for specific vehicle model details. The software design of the communication module May fail to communicate the correct vehicle location for the emergency call system (ecall) in the event of a crash.
Why it matters: Failure of the ecall system May result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.
The fix: Mbusa will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (ota) update, free of charge. The recall began March 12, 2021.
Most-reported problems
Owner complaints filed with NHTSA, by component. One complaint can list several components. 0 mention a fire, 0 injuries and 0 deaths were reported.
What owners describe
- Other / unknown (1): no single recurring theme in the descriptions.
The 2018 Mercedes-Benz Sl 450 has 1 owner complaints, ranking #1 of 3 Sl 450 model years for complaints (1.5× the average Sl 450 year). Neighboring years: 2019 (0 complaints, 4 recalls).
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 3.0 L 6-cyl turbo | Automatic 9-spd | Rear-Wheel Drive | 20 | 28 | 23 | Premium |
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the 2018 Mercedes-Benz Sl 450.
Closest thing to the factory manual for most years. Pay once, keep it.
Most $25–$78, one-timePro-shop repair procedures, wiring diagrams and TSBs for your exact car.
From $19.99/mo · $39.99/yrOEM procedures, specs and recall/TSB info, the same source many shops use.
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FAQ
Does the 2018 Mercedes-Benz Sl 450 have any recalls?
Yes. NHTSA lists 2 vehicle recalls for the 2018 Mercedes-Benz Sl 450. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What are the most common 2018 Mercedes-Benz Sl 450 problems?
Owners have filed 1 complaints with NHTSA. The most-reported areas are other / unknown (1).
What gas mileage does the 2018 Mercedes-Benz Sl 450 get?
EPA ratings run up to 23 mpg combined (3.0 L, Automatic 9-spd), across 1 engine and transmission combos.
Where can I get a 2018 Mercedes-Benz Sl 450 repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.