2015 Mercedes-Benz C400: Recalls, Problems & MPG
Here are the deets on the 2015 Mercedes-Benz C400: 8 recalls, 10 owner complaints and up to 24 mpg combined.
Recalls
8 vehicle recalls from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Steering Vehicle recall #14V598000 · 2014 · 10,509 vehicles
What's wrong: If the steering coupling interlock mechanism is not locked in place, the sliding shaft, which is part of the steering column, could become disengaged from the steering coupling socket due to vibrations, steering thrust, or load feedback from the road surface.
Why it matters: If the sliding shaft becomes disengaged from the steering coupling socket, the driver May experience noises, steering backlash, and in a worst case, loss of steering control, which May increase the risk of a crash.
The fix: Mbusa has notified owners, and dealers will inspect the steering coupling interlock mechanism to verify that it is in the locked position, free of charge. The recall began on October 1, 2014.
Exterior lights Vehicle recall #15V087000 · 2015 · 9,137 vehicles
What's wrong: " the affected vehicles were assembled with horizontal adjustment mechanisms that allow the owner to change the horizontal adjustment used during the manufacturing process, instead of the proper sealing caps.
Why it matters: If the original horizontal adjustment is used to alter the low beam aim, the misaimed headlamp May not properly illuminated the road or cause increased glare to oncoming drivers, which increases the risk of a crash.
The fix: Mercedes-benz will notify owners, and dealers will replace the horizontal adjustment mechanisms on the headlamps with sealing caps on the affected vehicles. The recall began May 23, 2016.
Fuel system Vehicle recall #15V138000 · 2015 · 3,039 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling certain model year 2015 c300 4matic and c400 4matic vehicles manufactured April 7, 2014, to July 25, 2014. In the affected vehicles, the fuel delivery module May be improperly secured to the fuel tank. Secondly, electrical wires that connect to the fuel delivery module might have been pinched between the flange of the fuel delivery module and the tank.
Why it matters: If the locking plate is not properly secured to the fuel delivery module it May become loose, and leak fuel, increasing the risk of a fire. If the electrical wires are pinched, the fuel pump May stop working, resulting in a stall, thereby increasing the risk of a crash.
The fix: Mbusa will notify owners, and dealers will inspect the vehicles for improperly secured locking plates and pinched wires, correcting the vehicles as necessary, free of charge. The recal began on April 24, 2015.
Steering Vehicle recall #15V845000 · 2015 · 28,452 vehicles
What's wrong: Due to an error in the electric power steering control unit software, the affected vehicles May have a loss of electric power steering assist.
Why it matters: If the vehicle experiences a loss of power steering assist, extra steering effort will be required, especially at lower speeds, increasing the risk of a vehicle crash.
The fix: Mbusa will notify owners, and dealers will update the power steering software, free of charge. The recall began in January 15, 2016.
Airbags Vehicle recall #17V627000 · 2017 · 495,290 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling these vehicles: 2014-2018 cla250, cla250 4matic, cla45 amg 4matic, 2015-2018 gla250, gla250 4matic, gla45 amg 4matic, c300 4matic, c63s amg, 2012-2014 c250, c350, c300 4matic, e550 4matic, 2013-2014 c63 amg, 2012-2015 c250 coupe, c350 coupe, c63 amg coupe, 2013-2015 c350 4matic coupe, glk250 4matic bluetec, glk350, glk350 4matic, 2016-2017 c350e, c43 amg, 2015 c400…
Why it matters: If the driver air bag inadvertently deploys, it can increase the risk of injury and a crash.
The fix: Mbusa will notify owners, and dealers will add sufficient grounding to the steering components, free of charge. The recall began in December 6, 2017.
Communication Vehicle recall #19V787000 · 2019 · 24,226 vehicles
What's wrong: 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. For a full list of the affected models visit: https://static.NHTSA.gov/odi/rcl/2019/rmisc-19v787-4620.pdf
Why it matters: An inaccurate vehicle location May delay emergency responders, increasing the risk of injury.
The fix: 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. The recall began December 23, 2019.
Body & structure Vehicle recall #21V197000 · 2021 · 15,096 vehicles
What's wrong: The front roof panel located between the windshield and the panoramic sunroof May not have been bonded correctly to the vehicle during a prior repair.
Why it matters: The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detach from the vehicle and become a road hazard, increasing the risk of a crash.
The fix: Mercedes-benz dealer will remove the bonded panel and will install a new front panel by following the detailed repair instructions and using the approved primer, cleaner and adhesive, free of charge. Owner notification letters were mailed on September 3, 2021 and October 26, 2021.
Body & structure Vehicle recall #23V854000 · 2023 · 2,976 vehicles
What's wrong: Please refer to mbusa's recall report for specific vehicle details. The front roof panel located between the windshield and the panoramic sunroof May not have been bonded correctly to the vehicle during a prior repair, allowing the front panel to detach from the vehicle.
Why it matters: A detached roof panel can become a road hazard, increasing the risk of a crash.
The fix: Dealers will replace the front panel, free of charge. Owner notification letters were mailed on August 2, 2024. Owner notification letters will be mailed in phases, on, March 22,2024, and August 2, 2024.
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
- Body & structure (6): no single recurring theme in the descriptions.
- Visibility/Wiper (1): no single recurring theme in the descriptions.
- Stability control (1): no single recurring theme in the descriptions.
- Electrical (1): no single recurring theme in the descriptions.
Complaints peaked in 2024 (4 filed that year). The typical problem showed up when the car was about 8 years old, at a median of 41,850 miles.
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 3.0 L 6-cyl turbo | Automatic 7-spd | 4-Wheel Drive | 21 | 28 | 24 | 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 2015 Mercedes-Benz C400.
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FAQ
Does the 2015 Mercedes-Benz C400 have any recalls?
Yes. NHTSA lists 8 vehicle recalls for the 2015 Mercedes-Benz C400. 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 2015 Mercedes-Benz C400 problems?
Owners have filed 10 complaints with NHTSA. The most-reported areas are body & structure (6), visibility/wiper (1), stability control (1).
What gas mileage does the 2015 Mercedes-Benz C400 get?
EPA ratings run up to 24 mpg combined (3.0 L, Automatic 7-spd), across 1 engine and transmission combos.
Where can I get a 2015 Mercedes-Benz C400 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.