2020 Mercedes-Benz Glc 300: Problems & Reliability
CAUTION2020 Mercedes-Benz GLC 300: CAUTION — 77 owner complaints, 1.2× the GLC 300 median year by raw count.
CarWhere's verdict score for the 2020 is 1.46, where 1.00 is a typical GLC 300 year once complaints are weighted for severity and spread over time on the road; caution starts at 1.25 and avoid at 1.60. 52% of its complaints are severe — a crash, fire, injury or a safety-critical system.
Sources: NHTSA owner complaints (ODI), recall campaigns and manufacturer service bulletins, CarWhere verified buyer prices · Model years 2018–2026 compared · Updated 2026-11-07 · By CarWhere Research · Methodology
77
NHTSA complaints
1.2×
vs. median GLC 300 year
208
Service bulletins
16
Recall campaigns
2020 Mercedes-Benz GLC 300 recalls
16 recall campaigns on federal record for the 2020, reported between Jul 19, 2019 and Feb 3, 2024.
| NHTSA campaign | Reported | Component |
|---|---|---|
| 24V070000 | Feb 3, 2024 | Exterior lighting › Headlights |
| 23V854000 | Dec 15, 2023 | Structure › Body › Roof and pillars |
| 22V365000 | May 20, 2022 | Electrical system › Software |
| 22V232000 | Apr 8, 2022 | Backup camera / back-over prevention › Display function |
| 21V961000 | Dec 13, 2021 | Fuel system, gasoline › Fuel injection system › Fuel rail |
| 21V527000 | Jul 12, 2021 | Air bags › Sensor › Side impact |
| 21V354000 | May 14, 2021 | Backup camera / back-over prevention › Sensing system › Camera |
| 21V197000 | Mar 19, 2021 | Structure › Body › Roof and pillars |
| 21V072000 | Feb 12, 2021 | Communication |
| 21V058000 | Feb 5, 2021 | Electrical system › Software |
| 20V651000 | Oct 23, 2020 | Steering › Electric power assist system |
| 20V364000 | Jun 22, 2020 | Engine & cooling › Engine › Gasoline › Turbo/supercharger |
+4 more campaigns on the NHTSA record.
2020 Mercedes-Benz GLC 300 service bulletins
The manufacturer has filed 208 technical service bulletins with NHTSA for the 2020 — close to the 197 of the median GLC 300 year from 2018 to 2026. Coded bulletins most often cover electrical system (101), powertrain / transmission (24), structure (20). Bulletins are repair instructions for dealer technicians, not recalls.
The 2020 vs. the year before and after
From the 2019 to the 2020, owner complaints rose 15% (67 → 77) — a step backward. The 2021 that followed fell 21% (77 → 61), so the 2021 has the lighter record so far.
| Model year | Verdict | Complaints | Bulletins | Recalls | Avg. buyer-paid |
|---|---|---|---|---|---|
| 2019 GLC 300 | SOLID | 67 | 216 | 12 | — |
| 2020 (this page) | CAUTION | 77 | 208 | 16 | — |
| 2021 GLC 300 | CAUTION | 61 | 197 | 7 | — |
Prices are averages of CarWhere verified buyer transactions (shown when 3+ deals exist for the year). Full year-by-year table: Mercedes-Benz GLC 300 years to avoid.
Nearby GLC 300 years with a better rating: 2019.
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FAQ
Is the 2020 Mercedes-Benz GLC 300 reliable?
2020 Mercedes-Benz GLC 300: CAUTION — 77 owner complaints, 1.2× the GLC 300 median year by raw count. CarWhere's verdict score for the 2020 is 1.46, where 1.00 is a typical GLC 300 year once complaints are weighted for severity and spread over time on the road; caution starts at 1.25 and avoid at 1.60.
What are the most common 2020 Mercedes-Benz GLC 300 problems?
The 2020 Mercedes-Benz GLC 300 has 77 NHTSA owner complaints and 208 manufacturer service bulletins on file; the component breakdown is on NHTSA's record for this model year.
How many recalls does the 2020 Mercedes-Benz GLC 300 have?
16 recall campaigns on federal record for the 2020 Mercedes-Benz GLC 300, most recently 24V070000 (Feb 3, 2024, exterior lighting); 23V854000 (Dec 15, 2023, structure); 22V365000 (May 20, 2022, electrical system). Recall completion is VIN-specific, so check the exact car.
How do I check a specific 2020 Mercedes-Benz Glc 300 before buying?
Decode the VIN free at carwhere.com/tools/vin-decoder to confirm the build, then run the $9.99 CarWhere Full VIN Report for the exact VIN — recall, complaint, and service-bulletin record for this model year, the original window sticker where the manufacturer publishes one, and a market price check from verified buyers. One-time purchase, no subscription.
Sources & method
Complaint, recall and service-bulletin counts for the 2020 Mercedes-Benz GLC 300 come from NHTSA's Office of Defects Investigation; the verdict is CarWhere’s severity-weighted, time-on-road-adjusted score compared with the model’s own median year. The live complaint feed was unavailable at render, so the complaint count is the verdict engine’s stored count. Complaints are owner allegations, not verified defects. Full methodology.