2018 Mercedes Benz C 300 4MATIC Problems, Complaints & Recalls
- Compared with other C 300 4MATIC years
- Far more complaints than other years 1st of 7 for complaints
- Safety recalls
- 3 recalls: check your VIN
- NHTSA crash rating
- Not rated
Owners have filed 12 complaints with NHTSA about the 2018 Mercedes Benz C 300 4MATIC. That is the most of any C 300 4MATIC model year in the database (7 years). The most reported problem area is structure (4 complaints, 33%). There are 3 safety recalls covering this model year. NHTSA has opened 1 defect investigation involving it.
- 12owner complaints
- 3safety recalls
- 1NHTSA investigations
- 0complaints mentioning a crash
Complaints are unverified owner reports and are not adjusted for sales volume.
Most common 2018 Mercedes Benz C 300 4MATIC problems
Complaints grouped by the part of the car owners reported, with the median mileage when the problem happened.
| Problem area | Complaints | Share | Median miles | Owners mention most | Typical repair cost |
|---|---|---|---|---|---|
| Structure | 4 | 33% | — | — | — |
| Unknown or Other | 3 | 25% | — | — | — |
| Engine | 2 | 17% | — | — | — |
| Air Bags | 1 | 8% | — | — | — |
| Communication | 1 | 8% | 49,000 | — | — |
| Electrical System | 1 | 8% | 49,000 | — | — |
| Seat Belts | 1 | 8% | 59,000 | — | — |
| Steering | 1 | 8% | — | — | — |
| Suspension | 1 | 8% | — | — | — |
| Visibility/wiper | 1 | 8% | — | — | — |
One complaint can list several problem areas, so shares can add up to more than 100%.
Complaints by year received
2018 Mercedes Benz C 300 4MATIC recalls (3)
Tap a recall to see the problem, the risk and the fix.
Exterior lighting:headlights
Problem: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2018 Mercedes-Benz C300 and C300 4MATIC vehicles. The headlights on these vehicles may not be properly adjusted. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
Risk: If the low beam headlight is not properly adjusted, the driver may have reduced visibility, increasing the risk of a crash.
Fix: MBUSA has notified owners, and dealers will inspect the setting of the headlights and adjust them, as necessary, free of charge. The recall began March 12, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019020008.
Air bags:sensor:occupant classification
Problem: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2018 C300 Cabriolet, C300 Coupe, C300 4Matic Cabriolet, C300, C300 4Matic Coupe, C300 4Matic, C43 AMG Cabriolet, C43 AMG Coupe, C63 S AMG Cabriolet, C350e Plug-In Hybrid, C63 AMG Cabriolet, C63 AMG Coupe, C63 S AMG Coupe, C63 AMG, C63 S AMG, 2018-2019 GLC300 4Matic Coupe, GLC300, GLC63 AMG Coupe, GLC300 4Matic, GLC350e Plug-In Hybrid, GLC43 AMG Coupe, GLC43 AMG, GLC63 S AMG Coupe, and GLC63 AMG vehicles equipped with Audio 20 head units and automatic child seat recognition. The status of the passenger side air bag may not display correctly.
Risk: If the passenger air bag is incorrectly displayed as 'ON' when it is not, a front seat passenger may be unaware that the air bag will not deploy in the event of a crash, increasing their risk of injury.
Fix: MBUSA will notify owners, and dealers will update the audio head unit software, free of charge. The recall began January 3, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2018120009.
Visibility:glass, side/rear
Problem: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2018 Mercedes-Benz C300, C300 4MATIC, C63 AMG, and C63S AMG vehicles. Incorrect bonding of the rear window may cause the window to loosen and detach from the vehicle.
Risk: If the window detaches from the vehicle, it can become a road hazard, increasing the risk of a crash.
Fix: MBUSA will notify owners, and dealers will rework the rear window bonding, free of charge. The recall is expected to begin November 2, 2018. Owners may contact MBUSA customer service at 1-800-367-6372.
To see whether a specific car still has an open recall, enter its VIN on NHTSA's official recall lookup. You can also decode a VIN here.
NHTSA defect investigations
- Desiccated Air Bag Inflator Rupture (EA21002) — opened Sep 17, 2021, still open.
Recent owner reports
Short excerpts of the latest complaints filed with NHTSA, with personal details removed. Full reports can be searched on NHTSA.gov.
Sunroof causing dangerous pinch conditions. Roof tracks break and cause pinch areas with partial opening of roof
I have begun noticing symptoms of the adhesive failing, such as excessive wind noise coming from the front roof area and visible gaps/separation between the panel and the vehicle body. This poses a severe safety risk, as the panel could completely detach while driving and become a high-speed road…
2018 Mercedes C300 - a hole rusted through the rear subframe causing structural safety concerns. This car has been routinely washed weekly and the frame should not have rusted through within only 8 years. This also led to a large repair bill.
****Please force Merces to recall all VIN's!******* NHTSA ID Number: 23V854000 1) Front glass roof panel came off while driving the car on the freeway. I didn't see or hear anything. When I got out of the car, I saw the entire piece has come off. This has caused my sunroof to malfunction, and it…
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…
Other Mercedes Benz C 300 4MATIC years
| Year | Complaints | Recalls |
|---|---|---|
| 2026 C 300 4MATIC | 1 | 1 |
| 2025 C 300 4MATIC | 0 | 1 |
| 2024 C 300 4MATIC | 3 | 0 |
| 2023 C 300 4MATIC | 1 | 1 |
| 2022 C 300 4MATIC | 0 | 1 |
| 2021 C 300 4MATIC | 1 | 0 |
| 2018 | 12 | 3 |
See all Mercedes Benz C 300 4MATIC problems by year, every Mercedes Benz model, or the Mercedes Benz VIN decoder.
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Frequently asked questions
What are the most common problems with the 2018 Mercedes Benz C 300 4MATIC?
Owners most often report structure, unknown or other, engine problems. The top one, structure, accounts for 4 complaints.
Was there a recall on the 2018 Mercedes Benz C 300 4MATIC?
Yes, 3 safety recalls. Enter your VIN at NHTSA.gov to check whether the repairs were done on your car.
Was the 2018 Mercedes Benz C 300 4MATIC a good year?
Complaint data can't fully answer that, because counts aren't adjusted for sales. Compared with other C 300 4MATIC model years, the 2018 has far more complaints than most years. Always get a pre-purchase inspection and check the VIN for open recalls.