MERCEDES-BENZ

LI20.20-P-079938

2025-12-20 · NHTSA 11026828

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

Complaint Warning message "Performance limited" in the instrument cluster and vehicle has lack of acceleration. Cause - A too high Temp difference between M43/1 Pump Temp Sensor and Temp Sensor in Power Electronics. DTC P0A9300 is detected by too low flow rate in the low temperature circuit of the power electronics N147. - Possible Restriction in the low Temp coolant circuit NT1. The difference between the temperature sensors in the pump from low temperature circuit and in the power electronics are to big. If the difference is too big, DTC P0A9300 will be set in the power electronics. Remedy If DTC P0A9300 is present in N147: • Follow the guided test step for DTC P0A9300 in power electronics N147 • Ensure that all HV safety guidelines are being followed as per WIS and that the vehicle is powered down. • Replace Cooler low temperature LT1 (from cooling circuit of power electronics) • Replace oil cooler (which is mounted on the drive unit) • Replace the complete cooling fluid (G40) from all cooling circuits If DTC P0A9300 is not present in N147: • upload HV CUL (N147 CUL) to paperless • Open TIPS case and attach QT, HV CUL to the case

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