An earth cable may be missing from the wiring harness of the communication module, which will cause the earth connection to run via the shielding of the microphone.
This will impair the proper functioning of the communication module, increasing the risk that emergency call could not be made.
The Mercedes-Benz AMG GT models affected by this recall were manufactured between 15 March 2018 and 22 October 2019.
Mercedes recall code: 5491018
Source: Rapex Alert 24/2020 A12/00854/20