2016 Mercedes-Benz C450 problems, complaints & recalls
Most-reported problem areas: Wheels (4) · Structure:body (3) · Wheels:rim (1)
Safety recalls (5)
Structure:body:roof And Pillars 2023-12-15 · campaign 23V854000 · 2,976 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2014-2020 C-Class, CLA, GLA, S-Class, GLC, and GLE vehicles. 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.
Risk: A detached roof panel can become a road hazard, increasing the risk of a crash.
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. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of NHTSA recall number 21V-197.
Structure:body:roof And Pillars 2021-03-19 · campaign 21V197000 · 15,096 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2020 C300 Coupe, C43 Coupe AMG, C43 AMG, 2015-2020 C300, GLA250, 2016-2018 C350e, CLA45 Coupe AMG, 2015 C400, S65 AMG, 2015-2019 C63 AMG, 2016 C450, 2015-2016 GLA45 AMG, S600, 2016-2020 GLC300, 2017-2019 GLC43 AMG, GLE43 Coupe AMG, 2014-2019 CLA250 Coupe, 2014-2015 CLA45 AMG, 2018 GLC63 AMG, 2014-2017 S550, 2018-2020 S450, 2016-2019 GLE63 Coupe AMG, 2016 GLE450 Coupe, 2014-2020 S63 AMG, 2018-2019 S560, and 2019 GLC350e vehicles equipped wi
Risk: 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.
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. Owners may contact MBUSA customer service at 1-800-367-6372.
Communication 2019-11-01 · campaign 19V787000 · 24,226 vehicles
Defect: 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
Risk: An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
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. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019120008.
Electrical System:starter Assembly 2017-02-23 · campaign 17V114000 · 307,629 vehicles
Defect: Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2015-2017 C300 4Matic, C300, CLA250, CLA250 4Matic and CLA45 AMG vehicles, 2017 C300 4Matic Cabrio, C300 4Matic Coupe, C300 Cabrio, C300 Coupe, E300, E300 4Matic, E400 4Matic Wagon, E43 AMG 4Matic, GLA250, GLA250 4Matic and GLC300 4Matic Coupe vehicles and 2016 C350e and GLC300 vehicles and 2016-2017 C450 4Matic AMG Sport and GLC300 4Matic vehicles. In the event that the engine or transmission cannot turn over, the starting current limiter ma
Risk: If the starting current limiter overheats, the surrounding components can melt, increasing the risk of a fire.
Fix: MBUSA will notify owners, and dealers will install an additional fuse in the electrical line to the starter, free of charge. The recall began August 31, 2017. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2017080002.
Visibility:sun/Moon Roof Assembly 2016-02-16 · campaign 16V087000 · 53 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain model year 2016 C300 vehicles manufactured December 11, 2015, to December 23, 2015, C300 4Matic vehicles manufactured December 12, 2015, to December 29, 2015, and C450 AMG 4Matic vehicles manufactured December 12, 2015, to December 22, 2015. The affected vehicles may be equipped with a panoramic sunroof that may not be properly bonded, allowing the glass to detach and fall from the vehicle during operation.
Risk: If the panoramic glass detaches during vehicle operation, it can increase the risk of injury or crash.
Fix: MBUSA will notify owners, and dealers will inspect the bonding of the rear sunroof glass panel, replacing it as necessary, free of charge. The recall began on April 12, 2016. Owners may contact MBUSA customer service at 1-800-367-6372.
Service bulletins (134)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Power Train 2026-09-26 · LI27.00-P-073124 · Service Bulletin/Repair Instructions
complaint customer complaints relating to automatic transmission 725.0 (nag3 classic /9g‑tronic automatic transmission) and 725.1 (nag3 facelift/9g‑tronic automatic transmission facelift) for faster, more effective and more targeted diagnosis, intelligent predictive repair (ipr) has been developed a
Service Brakes 2026-09-22 · LI42.10-P-078779 · Service Bulletin/Repair Instructions
complaint repeat workshop visit for vehicle vibration while braking from 60mph. note: although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. cause although the cause of the vibra
Structure:body 2026-09-14 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
complaint clanking noise from the area of the speakers in the doors. cause under analysis. remedy to narrow down the cause, first of all remove the door trim. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Power Train 2026-09-14 · LI27.10-P-075869 · Service Bulletin/Repair Instructions
complaint only vehicles with a variable transfer case are affected. this can be identified through control unit n45 or n15/7 in the quick test. when accelerating with light load, vibrations or jolting sensation may come from the drivetrain. it may be mistaken for a harsh shift. cause modified oil qu
Power Train 2026-09-04 · LI27.00-P-073124 · Service Bulletin/Repair Instructions
complaint customer complaints relating to automatic transmission 725.0 (nag3 classic / 9g‑tronic automatic transmission) and 725.1 (nag3 facelift/9g‑tronic automatic transmission facelift) for faster, more effective and more targeted diagnosis, intelligent predictive repair (ipr) has been developed
Steering 2026-08-28 · LI46.35-P-067339 · Service Bulletin/Repair Instructions
complaint during part of the steering movement, it feels heavier or more difficult to steer in the same spot every time. or rattling, humming, dry sliding/gravel noise from the electric steering system when steering (see attachment). complaint does not impact the ability to safely steer or control
Showing the 6 most recent of 134 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-05-06 · Power Train“sudden fracture of the propeller shaft universal joint at freeway speeds causing catastrophic damage to the transmission and exhaust system. this matches the failure described in nhtsa recall 26v216. while driving on arizona freeway 202. extreme clanking noise heard and lost all power in middle of rush hour. barely able to navigate vehicle safely …”
2025-04-10 · Visibility:sun/Moon Roof Assembly“just purchased this vehicle in utah, was driving from utah to idaho on the interstate at 80mph when all of a sudden my sunroof opened up with high winds and blew right off. luckily nobody was behind me but i’ve been driving 2 hours without a sunroof due to weak glue/manufacturing defect …”
2024-02-19 · Electrical System“the sunroof locked open during a road trip. i am mechanically inclined, so adding lubricant and driving through a low pressure air front caused the sunroof to shut. had i been in an emergency, not mechanically inclined, or if this happen during inclement weather or to a little old lady this would have been a severe issue causing the vehicle to beco…”
2023-02-21 · Structure:body“panoramic sunroof pillars/rails detaching while operating vehicle. 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. when operating the vehicle at a moderate speed, the sunroof continued to adjust itself on its own. belive that there is a risk of th…”
2022-05-23 · Unknown Or Other“when i go to put my car in reverse, or drive the gear control is malfunctioning and i’m afraid this can be deadly or cause serious injury.…”
2021-09-30 · Unknown Or Other“the part attaching the sunroof to the rails comes off and could cause the sunroof to come detached.…”
2021-05-21 · Unknown Or Other“the panoramic sunroof does not properly seal to car, allowing the glass to detach and fall from the vehicle during operation and likely to impair the operator during use. furthermore, without properly sealing the internal cabin is exposed to the environment (i.e. rain, snow, ect.) causing further damage to the internal safety and electrical feature…”
2021-05-21 · Unknown Or Other“panoramic sunroof exploded spontaneously while driving. there was no previous warning. glass shattered onto driver and passenger. the loud sound and glass shattering onto us could have caused self injury or accident to occur. auto insurance was notified at time of incident. vehicle was taken to mercedes benz dealership for repair. …”
2021-02-11 · Wheels · 35,511 mi“the rims cracked twice within 1 year. first time was in 2018 the 2nd 2019…”
2020-04-07 · Structure:body · 58,000 mi“the vehicle has a panoramic sunroof and i had opened the roof while i was parked and when i started driving something popped and the front of the sunroof lifted a little causing it to it the back glass portion of the panoramic roof. i pulled over to check it out and saw the the front guides were broken/detatched. i had to find a way to force the su…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.