Service bulletins for the 2018 Audi S7
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.
572 on file from NHTSA, as of 2026-10-19.
About C05ED on the 2018 Audi S7: what the code means, and the bulletins and recalls about the same components.
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By component
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Only bulletins with trouble code: C05ED are shown. Show all
| A3921422051558_6 | 2021-04-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin contains repair instructions for when the message "four-wheel drive malfunction" shows up sporadically in the instrument cluster with DTC C05ED00. |
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| A3920392051558_5 | 2021-01-08. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin contains repair instructions for when the message "four-wheel drive malfunction" shows up sporadically in the instrument cluster with DTC C05ED00. |
| A3920352051558_4 | 2020-09-03. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This bulletin contains repair instructions for when the message "four-wheel drive malfunction" shows up sporadically in the instrument cluster with DTC C05ED00. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.