2018 Mercedes-Benz C 300 4MATIC
Problems, Recalls & Reliability Report
Quick Summary
The 2018 Mercedes-Benz C 300 4MATIC has 11 owner complaints filed with NHTSA — that's 1.0x the segment average of 11. The most common issue is body/structure problems (27% of all complaints), specifically: 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.
11
Total Complaints
0
Recalls Issued
—/5
Safety Stars
1.0x
vs Segment Avg
Known Problems(top 5 of 7)
BODY/STRUCTURE
3 complaints- • 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
- • ****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 won
- • ****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 won
“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”
— NHTSA complaint filing
Fuel Cost Calculator for 2018 Mercedes-Benz C 300 4MATIC
Live EIA pricesBased on EPA fuel-economy ratings and EIA weekly retail prices (2026-07-20). Real-world cost varies with driving style, trim/engine, terrain, and traffic.
5-Year Gas Price History
EIA weekly retail data · 2021 → todaySource: US Energy Information Administration weekly retail gasoline prices.
Estimated Insurance Cost for 2018 Mercedes-Benz C 300 4MATIC
How this estimate is calculated
Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.
Maintenance & Warranty
Recommended Mercedes-Benz C 300 4MATIC Service Intervals
Service A / Service B alternating schedule. Requires MB-approved oil (229.5 spec typically).
"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.
Mercedes-Benz New-Vehicle Warranty Coverage
EQ EV battery warranty is 10 years/155,000 miles
These are the terms for a new Mercedes-Benz. If you're buying a used 2018 C 300 4MATIC, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Mercedes-Benz dealer for VIN-specific remaining warranty.
Estimated Repair Costs
Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.
🔍 Pre-Purchase Inspection Checklist
Based on 11 owner complaints for this specific year, here's what to check or ask about:
- ☐BODY/STRUCTURE: 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
Typically appears around 50K miles. Repair cost ~$500
- ☐OTHER: The contact owns a 2018 Mercedes-Benz C300 4matic. The contact received notification of NHTSA Campaign Number: 21V058000 (Communication, Electrical System) however, the part to do the recall repair was not yet available. The local dealer was contacted and stated that the equipment needed to perform
Typically appears around 50K miles. Repair cost ~$500
- ☐ENGINE: 2018 Mercedes C300. P052E check engine code. Positive Crankcase Ventilation failed with less than 28K miles. Common reported problem but not covered after warranty period, even with extended warranty addition. It's a major part of the engine function and 6 hours of labor to replace. Mercedes Benz
Typically appears around 50K miles. Repair cost ~$500
- ☐AIR BAGS: APPARENTLY THERE IS A RECALL SITUATION THAT INCLUDES MY VEHICLE AND MERCEDES BENZ WASN'T ABLE TO SOLVE IT YET. I BOUGHT THE CAR AFTER THE RECALL HAS BEGAN.
Typically appears around 50K miles. Repair cost ~$500
- ☐General: Get a pre-purchase inspection from an independent mechanic ($100-$200)
Mercedes-Benz C 300 4MATIC — Year Comparison
How does 2018 compare to other years? Fewer complaints = more reliable.
Full years-to-avoid analysis →NHTSA Safety Rating
No NHTSA safety rating available
At a Glance
- Complaints
- 11
- Recalls
- 0
- Fire reports
- 0
- Crash reports
- 0
- Injury reports
- 0
- Segment avg
- 11
Check a Specific VIN
See recalls for YOUR 2018 Mercedes-Benz C 300 4MATIC