Most common 2014 Mercedes-Benz SLK350 problems
Share of the 1 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz SLK350 complaints by model year
Best SLK350 years: 2013, 2015, 2016. Compare all years →
2014 Mercedes-Benz SLK350 recalls (2)
Communication
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2013-2017 vehicles due to a software fault that may cause the date and time for the emergency call system (eCall) to differ from the actual date and time, potentially relaying an inaccurate vehicle location.
Remedy: MBUSA has initiated an Over the Air (OTA) remote update. MBUSA will also notify owners, and dealers will check software for a successful OTA or update the communication module software as needed, free of charge.
Air bags
Mercedes-Benz USA, LLC (Mercedes-Benz) is recalling certain model year 2014 SLK 250, SLK 350, SLK 55 AMG, SL 550, SL 63 AMG, and SL 65 AMG vehicles manufactured March 19, 2014, through May 5, 2014. Due to an air bag assembly error, the front passenger air bag may not deploy properly.
Remedy: Mercedes-Benz will notify owners, and dealers will replace the front passenger air bag, free of charge. Mercedes-Benz distributed an interim letter to owners on July 17, 2014.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2014 Mercedes-Benz SLK350:
Desiccated Air Bag Inflator Rupture
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited.
2014 Mercedes-Benz SLK350 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.5L 6-cyl | 7-speed automatic | RWD | 21 / 28 / 24 |
EPA ratings. Class: Sports car.
Frequently asked questions
Is the 2014 Mercedes-Benz SLK350 a good car?
Based on 1 owner complaint filed with NHTSA, the 2014 SLK350 rates few complaints: about as many complaints as a typical year of the SLK350 at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2014 Mercedes-Benz SLK350?
The body & structure — 1 complaint, 100% of all complaints for this model year.
How many recalls does the 2014 Mercedes-Benz SLK350 have?
There are 2 recalls for the 2014 Mercedes-Benz SLK350, the most recent from November 1, 2019 (communication). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Mercedes-Benz SLK350?
The best years by complaints, compared at the same age, are 2013, 2015 and 2016. See the full Mercedes-Benz SLK350 years comparison.
At what mileage do 2014 Mercedes-Benz SLK350 problems happen?
The median mileage reported in complaints is about 3,000 miles; 100% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.