2018 Mercedes-benz C 300 reliability record
Every consumer complaint and recall the U.S. government (NHTSA) has on file for the 2018 Mercedes-benz C 300 — the repair risk behind the ownership cost.
- NHTSA complaints
- 128
- 102 in the last 5 years
- Top problem area
- ENGINE
- 34 complaints
- Recalls on record
- 18
- see below
- Reported harm
- 9 reported crashes · 2 injuries
How this record compares
raw NHTSA counts, not defect ratesComplaint rank
#3,578
of 4,194 vehicle records
Vs Mercedes-benz median
-41
median 169 across 69 Mercedes-benz records
Vs 2016-2020
-159
median 288 complaints in 538 records
Top component share
27%
Engine: 34 complaints
What owners report fails — 2018 Mercedes-benz C 300
- ENGINE 34
- UNKNOWN OR OTHER 20
- STEERING 11
- ELECTRICAL SYSTEM 10
- FUEL/PROPULSION SYSTEM 9
18 recalls on record for the 2018 Mercedes-benz C 300
- NHTSA 23V854000 · 2024 · STRUCTURE:BODY:ROOF AND PILLARS A detached roof panel can become a road hazard, increasing the risk of a crash.
- NHTSA 21V509000 · 2022 · EXTERIOR LIGHTING:HEADLIGHTS Incorrectly adjusted headlights may reduce visibility, increasing the risk of a crash.
- NHTSA 22V365000 · 2022 · COMMUNICATION: AUTO CRASH NOTIFICATION A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emerge
- NHTSA 21V197000 · 2021 · STRUCTURE:BODY:ROOF AND PILLARS The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detach from the vehicle a
- NHTSA 21V032000 · 2021 · SEAT BELTS:FRONT:RETRACTOR If the seat belt does not fully retract, the occupant may find the operation of the seat belt inconvenient and not wear
Estimate the 5-year cost to own a 2018 Mercedes-benz C 300
A vehicle's complaint record hints at the repair and maintenance budget you'll need. Add your state, purchase price, and mileage to the TCO calculator for the full picture.
Open TCO calculatorThese are unverified consumer reports and manufacturer recalls filed with the National Highway Traffic Safety Administration — not validated defect rates, and not adjusted for how many 2018 Mercedes-benz C 300 units were produced or sold. High-volume and older vehicles naturally accumulate more complaints. Use this as one research signal, not a verdict on any individual vehicle. Data as of 2026. Source: NHTSA Office of Defects Investigation (public domain).
Frequently asked questions
Is the 2018 Mercedes-benz C 300 reliable?
NHTSA has 128 consumer complaints on record for the 2018 Mercedes-benz C 300 and 18 recalls. The most-reported problem area is engine (34 reports). These are unverified consumer reports filed with the government, not validated failure rates, and are not adjusted for how many 2018 Mercedes-benz C 300 units were produced — popular vehicles naturally accumulate more reports.
What are the most common problems with the 2018 Mercedes-benz C 300?
Owners most often report problems with: engine (34), unknown or other (20), steering (11), electrical system (10). Each figure is the number of complaints filed with NHTSA for this exact model year.
How much does it cost to own a 2018 Mercedes-benz C 300?
Ownership cost depends on your state taxes, insurance, fuel, and the maintenance the vehicle's reliability record implies. Use the CarOutlay 5-year TCO calculator to estimate the full cost including the repair risk this complaint record suggests.