Mercedes-Benz C 300 2018–2023 — technical service bulletin
Bulletin LI20.00-P-074205 · NHTSA communication 11005314 · issued Jul 20, 2024
Technical service bulletin
communication type
Engine
component
2018–2023
model years
15
vehicle entries
Official summary
Complaint Yellow Coolant warning comes on in cluster Fault codes below are current or stored in MED41 P0A0500- The actuation of the circulation pump for the low-temperature circuit has an open circuit. P00B700- The coolant flow is too low. P0C7300- Circulation pump 1 for the low-temperature circuit has a malfunction. Cause Air may be trapped in the coolant circuit for transmission cooler Remedy Check coolant level. -If coolant level is low, locate source of leak and correct. -If coolant level is ok, perform procedure in attached instructions to bleed the coolant circuit to transmission cooler.
Vehicles covered
- 2018 Mercedes-Benz C 300
- 2019 Mercedes-Benz C 300
- 2020 Mercedes-Benz C 300
- 2021 Mercedes-Benz C 300
- 2022 Mercedes-Benz C 300
- 2023 Mercedes-Benz C 300
- 2020 Mercedes-Benz E 350
- 2021 Mercedes-Benz E 350
- 2022 Mercedes-Benz E 350
- 2023 Mercedes-Benz E 350
- 2019 Mercedes-Benz GLC 300
- 2020 Mercedes-Benz GLC 300
- 2021 Mercedes-Benz GLC 300
- 2022 Mercedes-Benz GLC 300
- 2023 Mercedes-Benz GLC 300
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.