Reliability Report · Multi-Source Data

Mercedes-Benz C-Class (2015–2017) Reliability

The Mercedes-Benz C-Class (2015–2017) scores 68/100 on our composite reliability index — average territory — drawn from ADAC, DVSA, NHTSA data. The most-flagged failure mode is thrust arm bushings wear (front suspension), typically surfacing between 90,000 and 180,000 km. Workshop repair runs €400–€900. In total we track 2 documented issues for this model — ranked by severity below. Estimated used prices span €11,700–€26,600.

Composite Score
68
/ 100
Average
Sources: ADAC · DVSA · NHTSA · latest 2026
Market Snapshot
Listed model years2015–2017
Est. used price€11,700–€26,600
Documented issues2
Listings in catalogue37
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Reliability by Source

Each independent organization measures reliability differently. TÜV reports inspection defect rates by age band. ADAC reports pan-European breakdowns per 1,000 vehicles. NHTSA aggregates US consumer complaints. DVSA MOT data is the UK fleet's annual safety inspection — every car 3+ years old. Lower variance across sources = higher confidence in the composite.

NHTSA (US Complaints)
Model years 2013–2019 · 2026 report · n=1503
1503 complaints across 5 sampled year(s); resolved model="C-CLASS"
View source ↗
35
/ 100
ADAC (European Auto Club)
All model years · 2025 report
6.3/1000 breakdowns
View source ↗
70
/ 100
DVSA MOT (UK Inspections)
Model years 2004–2021 · 2024 report · n=600933
600,933 UK MOT tests · overall 19.2% fail rate vs UK fleet baseline
View source ↗
80
/ 100
DVSA MOT (UK Inspections)
Model years 2003–2020 · 2023 report · n=360774
360,774 UK MOT tests · overall 22.0% fail rate vs UK fleet baseline
View source ↗
74
/ 100

UK MOT Reliability Detail

Based on 600,933 MOT tests in the UK during the 2024 reporting period. Score for each age band reflects this model's fail rate vs the UK-fleet baseline fail rate at the same age — a generation-aware metric.

Age 3–5 yrs
77
8.9% fail vs 10.9% fleet
64,676 tests
Age 6–9 yrs
82
13.3% fail vs 19.2% fleet
255,080 tests
Age 10–14 yrs
80
23.8% fail vs 32.1% fleet
182,968 tests
Age 15–20 yrs
76
32.8% fail vs 38.8% fleet
98,209 tests

Most Common MOT Failure Categories

#1
Condition
52,256
25.2%
#2
Ball joint
45,072
21.7%
#3
Ball joint dust cover
37,138
17.9%
#4
Tread depth
36,727
17.7%
#5
Linkage ball joint dust cover
36,538
17.6%

Categories ranked across all MOT tests of this model in the UK during the 2024 period. "Condition" covers cosmetic / wear issues; suspension and braking dominate the rest.

Known Issues

Specific failure modes documented across European workshops, owner forums, and TSBs. Costs in EUR (and USD reference) reflect typical retail European labor + parts ranges — specialist shops at the low end, dealer pricing at the high end.

Thrust arm bushings wear (front suspension)
Typical at 90,000–180,000 km
W204/W205 front lower thrust arms have soft bushings; clunks over bumps, MOT failure on play. Replaced as a pair.
€400–€900medium
COMAND infotainment boot loop
Typical at 80,000–180,000 km
W205 COMAND head unit boots-and-restarts repeatedly when SD card or media reader fails; sometimes resolved by sd card swap, sometimes head-unit replacement.
€600–€1,800medium

Compare Against Alternatives

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