# Service bulletin A3920352051558\_4

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.

- Type: Service bulletin
- NHTSA id: 10178820
- Published by NHTSA: 2020\-09\-03
- Manufacturer's number: A3920352051558\_4
- Manufacturer's date: 2020\-08\-21
- NHTSA component: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

## NHTSA's summary

This bulletin contains repair instructions for when the message "four\-wheel drive malfunction" shows up sporadically in the instrument cluster with DTC C05ED00.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178820-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178820-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Equipment and accessories, Transmission and driveline, Transfer case

## Trouble codes named

C05ED

## Vehicles listed

- 2018 to 2019 AUDI A4
- 2018 to 2019 AUDI A5
- 2018 to 2019 AUDI A5 CABRIOLET
- 2018 to 2020 AUDI A6
- 2018 to 2020 AUDI A7
- 2018 to 2019 AUDI ALLROAD
- 2018 to 2019 AUDI Q5
- 2018 to 2019 AUDI S4
- 2018 to 2019 AUDI S5
- 2018 to 2019 AUDI S5 CABRIOLET
- 2018 AUDI S6
- 2019 AUDI S6
- 2020 AUDI S6
- 2018 AUDI S7
- 2019 AUDI S7
- 2020 AUDI S7
- 2018 to 2019 AUDI SQ5

## Other bulletins for the same vehicles and component

- [A3924582059057\_7](/bulletins/10250543.md), 2024-03-06, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). This bulletin provides information when quattro Ultra has vibrations or binding in tight turns.
- [A3720012039650\_2](/bulletins/10177882.md), 2020-08-06, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); POWER TRAIN:AUTOMATIC TRANSMISSION. This bulletin contains instructions for addressing a leak from the transmission oil pan gasket or transfer case.
- [Bulletin \- 39E7](/bulletins/10159407.md), 2019-05-06, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). Replace All\-Wheel Drive Clutch
- [A341838 2048671\-](/bulletins/10153124.md), 2019-02-19, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); ELECTRICAL SYSTEM:SOFTWARE. This bulletin contains instructions for when DTC U030000 appears and ?All Wheel Drive Malfunction Message? is displayed in the instrument cluster.

JSON: [/v1/bulletins/10178820](/v1/bulletins/10178820)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20A3920352051558_4&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10178820&vehicle=Service%20bulletin%20A3920352051558_4)