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#BS-2020-MERC30-4E4F

2020 Mercedes-Benz C300Problems, Recalls & Reliability

Based on reports from 48 owners and 9 recalls for this exact model.

Data updated ·checked October 21, 2026 · NHTSA complaints through October 19, 2026

Complaints
48
Crashes
7
Fires
0
Recalls
9
TSBs
183
🟡

Preliminary Verdict

Think Twice

Based on 48 complaints, 7 crashes, 0 fires, and 9 recalls. Complaint rate is 1.5x the class average.

See full verdict with buy/skip conditions

Top reported problems

1

brake assist system

1 complaints • Severity 10/10

$X,XXX
2

gas leak smell and puddle

1 complaints • Severity 8/10

$X,XXX
3

stuttering shaking of vehicle

1 complaints • Severity 10/10

$X,XXX

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Mechanic Inspection Checklist

!Check the EngineHIGH

8 owners reported engine issues — failures commonly reported around 29K miles.

!Inspect the ElectricalMED
Look for symptoms of wear and premature failure
+ 6 more items in full checklistUnlock

Failure Timeline by Mileage

9
0–30K
2
30–60K
1
60–90K
3
90–120K
120–150K
150K+

Peak failure range: 0–30K miles (9 reports) • Median: 29K miles

Full report: which components fail at each mileageUnlock

30,000-Mile Cost Projection

Best Case

$X,XXX

Most Likely

$X,XXX

Worst Case

$X,XXX

Top cost driver: Engine (8 reports).

Includes fuel costs, common repairs, and recall riskUnlock

Also in your report

Owner Intelligence

AI-synthesized themes from real complaints

Buyer Lot Checklist

Questions, test drive checks, walk-away triggers

Negotiation Talking Points

Data-backed dollar deductions

Buy / Skip Verdict

Final recommendation with conditions

10 sections total in the full reportUnlock all

Where the complaints fall

Engine8 (17%)
Other5 (10%)
Electrical3 (6%)
Fuel System3 (6%)
Drivetrain3 (6%)
Airbags2 (4%)
Back Over Prevention2 (4%)
Forward Collision Avoidance: Automatic Emergency Braking2 (4%)

2020 Mercedes-Benz C300: Known Issues & Problem Areas

Engine Issues

Engine complaints account for 17% of all reports filed for the 2020 Mercedes-Benz C300, with 8 owners filing complaints with NHTSA. The median mileage at time of complaint is 28,722 miles, suggesting issues tend to surface around the 29K-mile mark.

Electrical Issues

Electrical complaints account for 6% of all reports filed for the 2020 Mercedes-Benz C300, with 3 owners filing complaints with NHTSA. Owners should pay attention to electrical-related symptoms during test drives and pre-purchase inspections.

Fuel System Issues

Fuel System complaints account for 6% of all reports filed for the 2020 Mercedes-Benz C300, with 3 owners filing complaints with NHTSA. Owners should pay attention to fuel system-related symptoms during test drives and pre-purchase inspections.

Drivetrain Issues

Drivetrain complaints account for 6% of all reports filed for the 2020 Mercedes-Benz C300, with 3 owners filing complaints with NHTSA. Owners should pay attention to drivetrain-related symptoms during test drives and pre-purchase inspections.

Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.

Complaint trend by year

6
20
6
21
7
22
1
23
6
24
10
25
12
26

Complaints filed with NHTSA by year for the 2020 Mercedes-Benz C300. Recent trend: stable.

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Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict

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Recall History (9 recalls)

20V068000Apr 2020

COMMUNICATION

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 C300 Cabrio, C300 Cabrio 4MATIC, C300 Coupe, C43 AMG Cabrio 4MATIC, C43 AMG Coupe 4MATIC, C63S AMG Cabrio, CLS53 AMG 4MATIC, E350, E350 4MATIC, E450 Cabrio, E450 Cabrio 4MATIC, E450 Coupe, E450 Coupe 4MATIC, E450 4MATIC, E53 AMG Cabrio 4MATIC, GLC300 Coupe 4MATIC, GLC300, GLC300 4MATIC, GLC63 AMG Coupe 4MATIC, AMG GT63 4-Door 4MATIC, and AMG GT63S 4-Door 4MATIC vehicles. An electrical circuit inside the Emergency Call System (eCall) communication module may be damaged, potentially relaying an inaccurate vehicle location.

20V364000Aug 2020

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 C300, E350, and GLC300 vehicles equipped with turbocharged 4-cylinder gasoline engines. The screws that retain the turbocharger oil feed and return lines may not have been properly tightened, possibly resulting in an oil leak.

21V032000Feb 2021

SEAT BELTS:FRONT:RETRACTOR

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2021 C300, 2017-2020 AMG C43, and AMG C63 vehicles. The front seat belts might not fully retract to their stowed position. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 208, "Occupant Crash Protection."

21V058000Mar 2021

COMMUNICATION: AUTO CRASH NOTIFICATION

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.

21V197000Sep 2021

STRUCTURE:BODY:ROOF AND PILLARS

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 with a panoramic sunroof. 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.

+ 4 more recalls in the full report

Recall severity analysis & seller scripts

The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.

Unlock

NHTSA Defect Investigations (1)

All closed. Investigations are how NHTSA decides whether a defect needs a recall.

PE21001ClosedOpened Jan 2021 · closed Oct 2021

Front Roof Panel Detachment

STRUCTURE:BODY:ROOF AND PILLARS

The worst model year for the Mercedes-Benz C300 is the 2016 — worth knowing if you're cross-shopping years. The biggest problem area is engine.

2020 Mercedes-Benz C300 vs. Class Average (Compact Cars)

This vehicle

48

Class avg

32

1.5x the class average — significantly more complaints than typical compact cars vehicles.

Complaint counts correlate with sales volume — popular vehicles naturally generate more reports. The full report normalizes for this.

About this data

NHTSA Complaints

Federal database of owner-filed safety complaints. 48 records for this vehicle.

NHTSA Recalls

Manufacturer-issued safety recalls. 9 recalls found for this vehicle.

Repair Cost Data

Real-world repair costs from owner reports and independent databases.

Last updated (checked October 21, 2026). NHTSA complaints received through October 19, 2026.

Other Mercedes-Benz C300 Model Years

2026202520242023202220212020201920182017201620152014201320122011201020092008
View all Mercedes-Benz C300 years →

2020 Mercedes-Benz C300: Frequently Asked Questions

What is the most common problem with the 2020 Mercedes-Benz C300?
The most commonly reported issue with the 2020 Mercedes-Benz C300 is related to the engine, with 8 complaints filed with NHTSA.
Is the 2020 Mercedes-Benz C300 reliable?
The 2020 Mercedes-Benz C300 has 48 complaints, 7 crash reports, and 0 fire reports filed with NHTSA. This is 1.5x the class average — higher than typical for its segment.
How much does it cost to fix 2020 Mercedes-Benz C300 problems?
Repair costs vary by issue. The full BumperScan report includes detailed repair cost estimates (low/median/high) for every major issue, plus a 30,000-mile total cost of ownership projection.
Does the 2020 Mercedes-Benz C300 have any recalls?
Yes, the 2020 Mercedes-Benz C300 has 9 recalls on record. The full report includes recall severity analysis and scripts for asking the seller about recall completion.
What mileage do Mercedes-Benz C300 problems start?
Based on 15 complaints with mileage data, the median mileage at time of complaint is 28,722 miles. The highest concentration of reported issues occurs in the 0–30K mile range. The full report breaks down exactly which components fail at each mileage bracket.
When was the 2020 Mercedes-Benz C300 data last updated?
BumperScan last checked this vehicle against NHTSA on October 21, 2026, covering owner complaints received through October 19, 2026 plus the latest recalls, investigations and technical service bulletins. Its numbers last changed on October 13, 2026.
What’s in the full report?
10 sections of AI analysis: severity-ranked issues, component scores (0-100), 30K-mile cost projection, failure timeline by mileage, recall details with seller scripts, owner sentiment analysis, mechanic checklist, buyer lot checklist, negotiation ammo with dollar figures, and a buy/skip verdict.
How is this different from free NHTSA data?
NHTSA gives you raw complaint text. BumperScan cross-references 2.1M+ complaints with community repair cost data, EPA fuel data, and recall records — then uses AI to synthesize it into actionable advice with dollar figures.
How is this different from Carfax?
Carfax is VIN-specific history ($45/report). BumperScan is model-level reliability intelligence — what problems this car is known for, what they cost, and whether you should buy it. Complementary, not competing.
What if the report isn’t useful?
100% money-back guarantee. If the report doesn’t help you make a more informed decision, we’ll refund you — no questions asked.
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10 sections of AI analysis based on 48 owner reports. Know before you buy.

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