Mercedes-Benz AMG C43 2021–2026 — technical service bulletin

Bulletin LI82.85-P-079530 · NHTSA communication 11026607 · issued Dec 12, 2025

Technical service bulletin

communication type

Electrical System

component

2021–2026

model years

vehicle entries

Official summary

Complaint The following most common complaints may be observed: • Brief connectivity interruptions when using Apple CarPlay over Wi-Fi • Audio cuts out • Device not recognized • No operation possible Cause There are multiple possible causes for an iPhone disconnecting from a vehicle’s head unit while using Apple CarPlay. These include hardware, software, and environmental factors: Environmental Interference: External Sources: • Passing under toll bridges, driving near airports, or areas with heavy electronic interference can cause connection drops. Cellular Networks: • Interference from nearby

Vehicles covered

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.