Technical Service Bulletin
Topic

Window Drop Glass Operation | Continental GT/GTC | 25-26MY

Market area

Bentley: worldwide (2WBE),China 796 VW Import Comp. Ltd (Vico), Beijing (6796)

Brand

Bentley

Transaction No. 2075821/4
Level

EH

Status

Released for publishing

Release date

Oct 8, 2025

Diagnostic trouble codes

Fault
symptom

Storage
state

Diagnostic address

Diagnostic trouble code

00BC - Rear passenger side door
electronics

B148754: Window regulator motor no
basic setting

Intermittent

00BB - Rear drivers side door
electronics

B148754: Window regulator motor no
basic setting

Intermittent

0042 - Driver's door electronics

B148754: Window regulator motor no
basic setting

Intermittent

0052 - Passenger's door electronics

B148754: Window regulator motor no
basic setting

Intermittent

New customer code

Object of complaint

Complaint type

Position

body attachments and installations -> door opening/closing, window
heating -> automatic window lowering for door opening

functionality -> operation
sequence incorrect

left rear

body attachments and installations -> door opening/closing, window
heating -> automatic window lowering for door opening

functionality -> operation
sequence incorrect

left
front

body attachments and installations -> door opening/closing, window
heating -> short stroke door closing

functionality -> no
function

left
front

body attachments and installations -> door opening/closing, window
heating -> short stroke door closing

functionality -> no
function

right
rear

body attachments and installations -> door opening/closing, window
heating -> short stroke door closing

functionality -> no
function

right
front

body attachments and installations -> door opening/closing, window
heating -> short stroke door closing

functionality -> no
function

left rear

body attachments and installations -> door opening/closing, window
heating -> automatic window lowering for door opening

functionality -> operation
sequence incorrect

right
rear

body attachments and installations -> door opening/closing, window
heating -> automatic window lowering for door opening

functionality -> operation
sequence incorrect

Vehicle data
Continental GT/GTC
Sales types

Type MY

Brand Designation Engine code Gearbox code Final drive code

Z23* 2025 E

*

*

*

Z23* 2026 E

*

*

*

Z24* 2025 E

*

*

*

Z24* 2026 E

*

*

*

Documents
Document name
master.xml
glass_reset_procedure_25my_gt_gtc.pdf
glass_set_sheet_gt_25my.pdf
glass_set_sheet_gtc_25my.pdf

right
front

Technical Service Bulletin
Window Drop Glass Operation | Continental GT/GTC | 25-26MY

Transaction No.: 2075821/4
Release date: Oct 8, 2025

Condition
•

Incorrect operation / function of the front and / or rear window drop glass

•

Front and / or rear drop glass fails to open / close or attempts to close and re-opens once contact has
been made between the glass and applicable seal

•

DTC for window regulator motor no basic setting B148754 evident within any of the 4 window control
modules (diagnostic address 42, 52, BB and BC) for loss of basic settings

Technical Background

IMPORTANT NOTE: Aftermarket window tinting can affect the operation of the windows, please advise
customers the onward instructions cannot be applied until the aftermarket tinting is removed
CAUTION
The operative must ensure the latest version of this TPI is obtained using the applicable VIN as TPI
versions change without notice

Should the issue still be evident after the instructions within this TPI have been conducted or if this is a
repeat repair; the operative must raise a new DISS query or respond via the existing DISS query and await
feedback before conducting any further work.

The answer to the following question must be included within the DISS query
Did the drop door glass operational issue occur when opening or closing the door?
Or
Whilst operating the applicable window?
NOTICE
NOTE TO PRODUCT SUPPORT: In the event a DISS query is received with a complaint relating to drop
glass operational issues after the instructions within this TPI have been conducted to completion and the
issue is still evident, please second level the DISS query to the Body and Trim Senior Engineer and await
feedback before responding to the retailer

Revision history
2075821/2 – The measure section has been updated to include further instructions on how to record the
glass set measurements.

2075821/3 – The measure section has been updated to include a further question regarding conditions
under which the issue may have occurred for the customer. The full 12v battery check and software update
instructions have been removed and can be referenced via the relevant campaign. The model year
applicability has been updated to include 26MY.

Production Solution
The Bentley continuous improvement policy has been implemented within the manufacturing process, the
required improvements have been utilised within this TPI

Service

VERY IMPORTANT: To eliminate a repeat repair the instructions within the Measure section and attached
PDF instructions must be conducted on the front and rear drop door glass - left and right hand side to
completion
ALL steps MUST be conducted from step 1 through to 8 (DO NOT IGNORE ANY OF THE STEPS)
ALL STEPS MUST BE CONDUCTED TO COMPLETION IN THE EXACT ORDER SHOWN
NOTICE
Should any issues be evident with the 12 volt battery / system this should be rectified first before
proceeding any further

The window closing time results (as below) must be attached to a new or existing DISS query
VERY IMPORTANT: Do not proceed with the time measurement request instructions unless the battery is
confirmed to be within specification (battery test) a 12 volt battery charger must also be attached as per Rep.
Gr 27
1) Passenger side front and rear window closing time
Hint: The window closing time should be 4 seconds
•

Measure the time (in seconds) it takes to close the front and rear windows from fully open to the fully
closed position

•

Record the time

Passenger side front =

seconds

Passenger side rear =

seconds

Comments

Driver side front and rear

Hint: The window closing time should be 4 seconds
•

Measure the time (in seconds) it takes to close the front and rear windows from fully open to the fully
closed position

•

Record the time

Driver side front =

seconds

Driver side rear =

seconds

Comments

How did the issue occur for the customer?
•

Opening / closing the front door

•

Operating the window from the master switch pack (driver’s door)

•

Operating the window from the respective switch pack

•

Opening / closing the convertible roof (only applicable for convertibles)

Comments

Section 1 – Software update to the rear door control modules 00BB and 00BC – Short drop function
elimination
NOTICE
IF CAMPAIGNS ED18, ED54, ED55, ED56 HAVE ALREADY BEEN COMPLETED ON THE VEHICLE
PROCEED TO SECTION 2.
2) If campaigns ED18, ED54, ED55, ED56 have not been completed on the vehicle, perform the software
update as described in the campaign and ENSURE ALL STEPS ARE COMPLETED FULLY.

Section 2 - Rectification / Check Instructions
3) Conduct a thorough check of all Window / door seals for the following:
•

Damage

•

Splits

•

Tears

•

Misalignment

•

Incorrectly fitted / located

•

Drop glass seal deformation (see Figures 1 and 2 as examples)

Figure 1

Figure 2
NOTE: Any issues found with the window seals must be rectified before conducting the remaining steps
4) VERY IMPORTANT: Referring to the attached PDF instruction and the instructions in section 3, the
operative must now conduct all steps to completion before continuing to step 5 - The process within the
attached PDF instruction MUST be performed to completion in all cases regardless if the window
measurements are initially within specification
NOTICE
Please ensure all steps are followed within the attached glass check / measurement PDF documents, the
operative should be aware there is (x1) document for New Continental GT and (x1) document for New
Continental GTC please ensure the correct document is used depending on vehicle type

Ensure all required measurements are attached to a new or existing DISS query
NOTICE
If not already done so, review eAcademy Digital Learning HUB videos on Glass Setting Procedures for GT

/ GTC before proceeding to ensure accurate and repeatable measurements are being made

The process is the same as demonstrated in the videos, however, for 25 & 26MY vehicles, one of the
measurement points has changed.
PLEASE FOLLOW THE ATTACHED GLASS SET MEASUREMENT TABLES CAREFULLY.
Log into eAcademy - Select / open Digital Learning HUB - All content - Technical information - Continental
GT & GT Convertible (2017+) Technical Information
•

The operative must review the (x3) videos which are available on the Digital Learning HUB (see
example shown in Figure 3 of all videos which must be reviewed)

Figure 3

Section 3 - Glass Set Measurement Instructions
CAUTION
In addition to the videos above, strictly adhere to the instructions shown below when completed the glass
set measurement process.
If unsure about the measurement process follow the video on eAcademy or raise a full technical DISS query.
To eliminate confusion about the usage of WT10549/3 and the Y axis profile measurement between the front
and rear windows and how to correctly read/enter the measurements in the tables, please refer to the below
images to aid with accurate reading of the Y axis profile when using WT10549/3.
Window Parallel
When the window is parallel take the 2mm step from the tool and minus the 2mm gap between front window
and tool = -0mm (as shown in figure 4)

Figure 4
When the rear window is 0mm inboard from the front glass and the windows are parallel, the measurement
written as 0mm (figure 5)

Figure 5
Rear Window Inboard
When the rear window is inboard and there is a 2mm step from the tool, when there is no gap between either
window and tool (figure 6), the recorded measurement should be -2mm (figure 7)

Figure 6

Figure 7
Rear Window Too Far Inboard
When the rear window is inboard and there is a 2mm step from the tool as well as an additional 1.5mm gap
to the window (figure 8), the recorded measurement should be -3.5mm (figure 9).

Figure 8

Figure 9
If the tool (WT10549/3) does not sit flush against the rear window then this shows rear window is more than
2mm inboard (more than -2mm), check this by holding the tool on the front window and measuring gap
between the rear glass and the tool (as shown in figure 10)

Figure 10

Section 4 – Final Checks
5) VERY IMPORTANT - Referring to Rep.Gr 64 - Side glass - To initialise

CAUTION
When conducting step 7 extra care must be taken to ensure the interior trim is suitably protected, any
water which enters the vehicle due to a leak must be dried / cleaned immediately
Hint: Ensure all windows, sunroof and convertible roof (where applicable) are fully closed before conducting
the water leak check
6) Conduct a water leak check to ensure that water is not leaking into the vehicles interior
•

Water leaks must be resolved before returning the vehicle to the customer

7) Conduct a short road test to check for any wind noise related issues
CAUTION
Wind noise issues must be resolved before returning the vehicle to the customer
8) Raise a technical DISS query ensuring the following is attached
•

Completed final glass measurements (Post reset / readjust)

•

Confirmation of glass / window closing times (as step 1)

•

Explanation of the usage conditions when the issue occurred (as step 1)

•

Images of any issues found with seals

Should the issue still be evident after conducting steps 1 through to 8 the operative must raise a new DISS
query or respond via the previously opened DISS query and await feedback before conducting any further
work
NOTICE
NOTE TO PRODUCT SUPPORT: In the event a DISS query is received with a complaint relating to drop
glass operational issues after the instructions within this TPI have been conducted to completion and the
issue is still evident, please second level the DISS query to the Body and Trim Senior Engineer and await
feedback before responding to the retailer

Warranty
Warranty type

110 or 910

Damage service number

64 38

Damage code

00 12

Time to conduct initial checks
Labour operation code

64 38 02 00

Time

30 TU

Time to conduct window seal checks
Labour operation code
Time

57 63 01 01
20 TU

Time to conduct the front and rear glass set procedure (left and right hand side)
Labour operation code
Time

64 40 16 01
620 TU

Water leak test
Labour operation code
Time

64 38 01 99 (Use this code when conducting the water leak test)
20 TU

Post repair road test
Labour operation code
Time

01 21 00 01
30 TU

Required Parts and Tools
Reference ETKA where required

INTERNAL

#

Side glass measurements GTC 25MY
Interlock (Z-Axis)

Vehicle Position

Dimension -X-

1 50 mm from division bar
2 100 mm from division bar

Front quarter glass
Front of door drop glass

7.5 mm ± 1 mm
8.5 mm ± 1 mm

3 50 mm from rear of door drop glass

Rear of door drop glass

8.5 mm ± 1 mm

6 50 mm from rear drop glass division bar

Front of rear quarter glass

8.5 mm ± 1 mm

7 100 mm from where the hood meets the
brightware

Rear of rear quarter glass

10 — 16mm

Interlock (X-Axis) Roof Up

Vehicle Position

Dimension -X-

4 50 mm from the top of the window

Rear door quarter glass strip to
front door drop glass edge
11 mm ± 1 mm

5 50 mm from the waistrail seal

Rear door quarter glass strip to
front door drop glass edge
11 mm ± 1 mm

Interlock (X-Axis) Roof Down

Vehicle Position

4 50 mm from the top of the window

Rear door quarter glass strip to
front door drop glass edge
11 mm ± 1 mm

5 50 mm from the waistrail seal

Rear door quarter glass strip to
front door drop glass edge
11 mm ± 1 mm

Profile (Y-Axis)

Vehicle Position