Limp-Home Mode, Basic Function - GF27.60-P-9900A

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2023 Mercedes-Benz CLA45 AMG, 2023 Mercedes-Benz CLA35 AMG, 2023 Mercedes-Benz CLA250, 2022 Mercedes-Benz CLA45 AMG, and 2022 Mercedes-Benz CLA35 AMG. However, it is still accessible from the selected car via links, so may be relevant.

Model All with transmission 700.4, 724.0/1

Overview

This document contains information on:

General
Function

General

The fully integrated transmission control electrohydraulic controller unit or the dual-clutch transmission control unit switches to the limp-home mode when individual components malfunction.

Function

The dual-clutch transmission control unit or the fully integrated transmission control electrohydraulic controller unit uses sensors to monitor the status of the transmission control, using e.g. pressure and temperature sensors. If a shifting-relevant component part is defective or if it can no longer be actuated, the corresponding sub-transmission is no longer available. The driver is notified of a malfunction visually and acoustically on the instrument cluster. Shifting comfort is restricted or driving is no longer possible.

Function schematics
Function schematic for limp-home mode	Model all with transmission 700.4, 724.0/1	PE27.19-P-2502-97A
Detailed information
Limp-home mode, detailed information	Transmission 724.033/044/045	GF27.60-P-2500A
	Transmission 700.420/421/422/423	GF27.60-P-2500B
	Transmission 724.103/114/115/120	GF27.60-P-2500C