Technical Service Bulletin
47 Vibration/noise from brake pedal area - pedal feels different - DTC P05FF00
47 24 28 2068205/5 March 22, 2024. Supersedes Technical Service Bulletin Group 47 number 23-23 dated April
18, 2023 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

e-tron GT, and
RS e-tron GT

2022 - 2024

All

Not Applicable

Condition
REVISION HISTORY
Revision

Date

Purpose

5

-

Revised Service (Updated procedure)
Revised Technical Background (Updated Procedure)
Revised header (Updated Model Year)

4

04/18/2023

Revised Service & Technical Background (Revised Procedure)
Revised header (Added Model Year)

3

12/19/2022

Revised Service (Revised Procedure)
Revised Warranty (Revised Labor Operation)

Customer states:
• During braking at low speeds, a vibration/pulsation is felt at the brake pedal.
AND/OR
• The brake response feels “different”.
Workshop findings:
The following DTC may be stored in the ABS/ESC Control Module -J104- (address word 0003):
• DTC P05FF00 – Brake pressure sensor / Sensor for brake pedal travel deviation.
The complaint can be reproduced.

Technical Background
Information concerning e-tron GT Brake System.
Bedding-in routine not yet complete.

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Technical Service Bulletin
On new vehicles or after changing the brake pads, the new brakes must be bedded in. The vehicle performs this
procedure independently by briefly deactivating the recuperation function. Depending on the driving style, the
bedding-in routine may take up to 1000 miles.
“Brake refresh” function
This function helps to preserve the friction value of the brakes. After the vehicle has been stationary for an
extended period (+12 hours), braking energy of 500 kJ is applied to the mechanical brakes.
During this procedure, the recuperation function is deactivated briefly.
“Stiffness adaptation routine” function
During a regenerative braking (recuperation) procedure, the electric braking torque of the electric drive motors
needs to be exchanged for the hydraulic braking torque of the wheel brakes “blending” at least once, usually
shortly before the vehicle comes to a standstill.
To eliminate longitudinal braking fluctuations during “blending”, the control units involved (ABS/ESC control unit
and electromechanical brake servo) must be informed as precisely as possible of the actual stiffness of the brake
system.
For this purpose, a defined pressure value of the electromechanical brake servo is built up and then released
again with as small a gradient as possible. During this build-up and release of pressure, the ABS/ESC control unit
learns the current stiffness of the wheel brakes and stores the values. While the function is active, the brake pedal
moves approximately 1 in.
The brake lights are not activated in the process.
• The routine above is performed during every charging procedure.
• The adaptation procedure takes approx. 10 seconds.
• No adaptation procedure is accepted if the brakes are hot, or if the steering wheel is turned significantly out of
the center position.
• The adaptation procedure is only performed if the temperature of the brake discs is