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Service bulletin LI83.70-P-078292

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11012788
Published by NHTSA2025-01-10
Manufacturer's numberLI83.70-P-078292
Manufacturer's date2025-01-09
NHTSA componentELECTRICAL SYSTEM; VISIBILITY/WIPER

NHTSA's summary

Complaint Red warning message in instrument cluster: "Towing not allowed, see Operator's Manual, consult workshop without starting the engine again". Cause Missing diaphragm on high voltage PTC (interior heating) N33/14 component part results in moisture buildup in the installation space for the heater and causes an insulation fault. The entry of moisture into the high voltage PTC (interior heating) N33/14 in the high voltage wiring harness to the DC/DC converter N83/1 causes a slow-acting insulation fault. This may occur sporadically only to start with before actively developing over time. Remedy Exchange high voltage PTC (interior heating) N33/14 with new part with diaphragm (production date as from 22T231, see component part label). If necessary, and after further testing/measurement, replace wiring harness for DC/DC converter N83/1 to high voltage PTC (interior heating) N33/14. Note: According to the Replacement Parts Department only high voltage PTCs (interior heating) with a diaphragm and with production date as from 22T231 are available!

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Glass, wipers and mirrors, Wipers and washers

Vehicles listed
MERCEDES-BENZ AMG EQE2023 to 2024
MERCEDES-BENZ EQE 350 4MATIC2024
MERCEDES-BENZ EQE 350+2023 to 2024
MERCEDES-BENZ EQE 5002023 to 2024
MERCEDES-BENZ EQS 450+2022 to 2024
MERCEDES-BENZ EQS 5802023
MERCEDES-BENZ EQS SUV 450 4MATIC2023 to 2024
MERCEDES-BENZ EQS SUV 450+2023 to 2024
MERCEDES-BENZ EQS SUV 580 4MATIC2023 to 2024
MERCEDES-BENZ redundant EQE 3502024
MERCEDES-BENZ redundant EQE 350 4MATIC2023
MERCEDES-BENZ redundant EQS 4502023 to 2024
MERCEDES-MAYBACH EQS SUV 680 4MATIC2024

Listing a model year does not mean every vehicle of it is concerned: the document says which.