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Fire risk Published 28 Sep 2023 Ref JP-1236850

Mercedes-Benz: Wiring

Translated from Japanese · machine translation

Safety-critical recall — fire risk. If your vehicle is affected, contact your dealer before driving.
Country
Japan
Published
28 Sep 2023
Units affected
1032
Reference
JP-1236850

Affected vehicles

Mercedes-Benz C180 2022–2023 Mercedes-Benz C200 2022–2023 Mercedes-Benz C200 4MATIC 2022–2023 Mercedes-Benz C220d 2022–2023 Mercedes-Benz Mercedes-AMG C43 4MATIC 2022–2023

Hazard

In 12V and 48V ground wiring located in the engine compartment and undercarriage, improper assembly during manufacturing has resulted in some vehicles where the nut at the body ground terminal point is not tightened to the specified torque. Consequently, vibration during operation can cause the nut to loosen, increasing electrical resistance and generating heat, which may melt surrounding components and in worst cases lead to fire.
Show original (日本語)
エンジンルーム内や床下の12V, 48Vアース配線において、製造時の組付けが不適切なため、ボディーアースのターミナルポイントにナットが規定トルクで締め付けられていないものがありる。そのため、走行時の振動等で当該ナットが緩み電気抵抗が増加して、発熱することで周囲の部品が溶損し、最悪の場合、火災に至るおそれがある。

Remedy

Inspect all vehicles for looseness of nuts in the 12V and 48V ground wiring in the engine compartment and undercarriage. If looseness is found, inspect the contact surface of the ground wiring and nut, then retighten to specified torque. If the contact surface is damaged or melting is evident in surrounding areas, replace the affected components with new parts.
Show original (日本語)
全車両、エンジンルーム内や床下の12V, 48Vアース配線のナットの緩みを点検する。緩みがある場合はアース配線やナットの接触面を点検し規定トルクで締め付けなおす。なお、接触面に損傷がある場合や、周囲に溶損がある場合は、関連する部品を新品に交換する。

Official source

View the official recall notice