WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2015 Audi S7, 2015 Audi RS 7, 2015 Audi A7 Quattro, 2014 Audi S7, and 2014 Audi RS 7. However, it is still accessible from the selected car via links, so may be relevant.

Gray 32-pin Connector -A-

Fig 1: Identifying MOST Bus Connection

Courtesy of AUDI OF AMERICA, LLC

MOST Bus ring break diagnosis
Not assigned
CAN Bus instrument cluster Low
CAN Bus instrument cluster High
Fuel tank sensor ground
Fuel Level Sensor -G-
Fuel Level Sensor -G-
Display unit button -E506- (reset button)
Fuel Level Sensor 2 -G169-
Fuel Level Sensor 2 -G169-
Not assigned
Not assigned
Not assigned
Not assigned
Not assigned
Not assigned
Not assigned
Not assigned
Night vision system control module -J853- "-"
Night vision system control module -J853- "+"
Not assigned
Not assigned
Not assigned
Not assigned
Not assigned
Not assigned
Not assigned
Not assigned
Terminal 31
Terminal 31
Terminal 30
Terminal 30

Optical MOST-Bus Connection (Fiber Optic) -B-

Fig 2: Identifying MOST Bus Connection

Courtesy of AUDI OF AMERICA, LLC

MOST Bus input
MOST Bus output

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Instrument Cluster Multi-Pin Connector Assignment

Use the Manual With the Right Hardware

When to See a Mechanic