Mercedes-Benz C 300 2020–2025 — technical service bulletin
Bulletin LI07.70-P-078520 · NHTSA communication 11015543 · issued Mar 7, 2025
Technical service bulletin
communication type
Engine
component
2020–2025
model years
17
vehicle entries
Official summary
Complaint Check engine light on. Engine in limp-home mode. Rough running. Low fuel rail pressure fault code P008700 stored in MRG2 control unit. Additional faults below may be stored in MRG2 control unit: Misfire- P030000, P030100, P030200, P030300, P030400, P030084, P030004 Mixture adaptation- P217800 P218762, P017100, P017200, P217700 Injector malfunction- P02EE00, P02EF00, P02F000, P02F100, P214601, P214901 Cause Gas bubbles forming in low pressure fuel system due to fuel boiling. Remedy -Check engine control unit N3/10 for software update. -Proceed with software update if new software vers
Vehicles covered
- 2022 Mercedes-Benz C 300
- 2023 Mercedes-Benz C 300
- 2024 Mercedes-Benz C 300
- 2024 Mercedes-Benz Cle 300
- 2024 Mercedes-Benz E 350
- 2025 Mercedes-Benz E 350
- 2025 Mercedes-Benz E 350 4MATIC
- 2023 Mercedes-Benz GLC 300
- 2024 Mercedes-Benz GLC 300
- 2025 Mercedes-Benz GLC 300
- 2024 Mercedes-Benz GLC 300 Coupe
- 2020 Mercedes-Benz GLE 350
- 2021 Mercedes-Benz GLE 350
- 2022 Mercedes-Benz GLE 350
- 2023 Mercedes-Benz GLE 350
- 2024 Mercedes-Benz GLE 350
- 2025 Mercedes-Benz GLE 350 4MATIC
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.