Dimension -X-

1 50 mm from division bar

Front quarter glass

10 mm ± 1 mm

2 100 mm from division bar

Front of door drop glass

14 mm ± 2 mm

8 50mm forwards of rear of front drop glass (waist
rail gap)

Rear of door drop glass

5mm ± 1mm

9 50mm rearward of front of rear drop glass (waist
rail gap)

Front of rear quarter glass

5mm ± 1mm

Profile (Y-Axis) Roof Up

Vehicle Position

Dimension -X-

4 50mm from top of division bar

Front drop glass to rear quarter
glass
+0 mm / – 2.5 mm

5 50mm from bottom of division bar

Front drop glass to rear quarter
glass
+0 mm / – 2 mm

Profile (Y-Axis) Roof Down

Vehicle Position

4 50mm from top of division bar
5 50mm from bottom of division bar

Dimension -X-

Dimension -X-

Front drop glass to rear quarter
glass
+0 mm / – 2.5 mm
Front drop glass to rear quarter
glass
+0 mm / – 2 mm

Before
adjustment

After adjustment

Before
adjustment

After adjustment

Before
adjustment

After adjustment

Before
adjustment

After adjustment

Before
adjustment

After adjustment

Before
adjustment

After adjustment

INTERNAL

#

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

Vehicle Position

Before
Dimension -X- adjustment

A 50 mm from division bar
B 150 mm from division bar

Front quarter glass
Front of door drop glass

7.5 mm ± 1 mm
8 mm ± 1 mm

C 50 mm from rear of door drop glass

Rear of door drop glass

8 mm ± 1 mm

D 50 mm from rear drop glass division bar

Front of rear quarter glass

8 mm ± 1 mm

E 50 mm from rearmost section of rear drop glass

Rear of rear quarter glass

8 mm ± 1 mm

Interlock (X-Axis)

Vehicle Position

Before
Dimension -X- adjustment

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

Before
Dimension -X- adjustment

1 50 mm from division bar

Front quarter glass

10 mm ± 1 mm

2 150 mm from division bar

Front of door drop glass

10 mm ± 2 mm

3 50 mm from rear of door drop glass

Rear of door drop glass

10 mm ± 2 mm

6 50 mm from rear drop glass division bar

Front of rear quarter glass

10 mm ± 2 mm

7 50 mm from rearmost section of rear drop glass

Rear of rear quarter glass

10 mm ± 2 mm

8 50mm forwards of rear of front drop glass (waist
rail gap)

Rear of door drop glass

5mm ± 1mm

9 50mm rearward of front of rear drop glass (waist
rail gap)

Front of rear quarter glass

5mm ± 1mm

Profile (Y-Axis)

Vehicle Position

Before
Dimension -X- adjustment

4 50mm from top of division bar

Front drop glass to rear
quarter glass

+0 mm / – 2.5 mm

5 50mm from bottom of division bar

Front drop glass to rear
quarter glass

+0 mm / – 2 mm

After
adjustment

After
adjustment

After
adjustment

After
adjustment

INTERNAL

•
•
•
•
•
•
•
•
•
•

INTERNAL

Introduction Page 3
Front quarter glass adjuster reset Page 4
Front door regulator adjuster reset Pages 5, 6 & 7
Rear quarter regulator adjuster reset Pages 8, 9 & 10
Measuring front glass intrusion into front division bar Page 11
Z Axis height adjustment on front drop glass Page 12
Waistrail measurement checking/resetting Pages 13, 14 & 15
Window entry into cant rail/convertible roof seal Page 16
Final Checks Page 17
Glass set measurement sheets Page 18 & 19

Alex Broadbent VT/QQ

In instances of multiple window drop concerns it has been found that to achieve Glass set specifications some
adjusters are being adjusted far out of specification.
In some cases since not all adjusters are visible, there is a possibility that the adjusters can be set to their maximum
inboard/outboard and induce excess tension in the regulators and affect the angle the windows enter the seals.
There is free play built into the front and rear regulators, therefore as the windows are being held in place by the cant
rail/convertible roof seals when closed, this may not be apparent when measuring as per ELSAPRO. However, these
extreme adjustments can cause issues with how the windows enter the cant rail/convertible roof seals or how the front
and rear glasses interlock with each other, in some cases this can cause the seals to pinch and cause an anti trap
condition leading to window reversal.
The following procedure should be applied to reset the regulator adjusters to factory delivered specification and then
fine tune any adjustments from there in line with ELSA specifications. To do this, the drop glass window should be
removed first to prevent damage during adjuster resetting and access to all 8 adjusters is needed so front door and
rear quarter panel trims will require removal.
If not already done so, review E-Academy videos on Glass Setting Procedures for New GT/GTC before proceeding to
ensure accurate and repeatable measurements are being made.

INTERNAL

Alex Broadbent VT/QQ

Front Quarter glass adjuster Item 1
Measurement between bottom of mounting
washer and division bar frame, is 12.5mm.
To reset this adjuster without removing the
quarter glass, loosen the lock nut, screw the
adjuster all the way in clockwise until it
bottoms out on the frame, then unscrew anti
clockwise 4 complete turns then set height and
profile to ELSA specification before moving on
to the next step.

INTERNAL

•

Image for reference, glass does not
require removal from vehicle

Alex Broadbent VT/QQ

•

Regulator adjusters X1 X2
Measure from top of mounting washer to frame
X1 = 4mm
X2 = 4.5mm

Regulator adjusters Y1 Y2
Measure from top of mounting washer to frame
Y1 = 14mm
Y2 = 10mm

Reset all 4 adjusters as described in the following slides, then
continue to reinstall and set front drop glass to ELSA
specifications before moving on to the next step.
INTERNAL

Alex Broadbent VT/QQ

Regulator adjusters
Y1 Y2
Measurement from top
of mounting washer to
frame

•

Y1

Images for reference, regulator does
not require removal from vehicle

Y2

Y1 = 14mm, To reset
this adjuster without
removing the front
regulator, fully screw in
clockwise until hard
stop, then unscrew 12
turns anticlockwise
Y2 = 10mm, To reset
this adjuster without
removing the quarter
glass fully screw in
clockwise until hard
stop, then unscrew 8.5
turns anticlockwise

INTERNAL

Alex Broadbent VT/QQ

Regulator
adjusters X1 X2
Measure from top of
mounting washer to
frame
X1 = 4mm, To reset
this adjuster without
removing the
regulator fully screw
in clockwise until
hard stop, then
unscrew 4 turns
anticlockwise

•

X2

X1

Images for reference, regulator does
not require removal from vehicle

X2 = 4.5mm, To
reset this adjuster
without removing
the regulator
fully screw in
clockwise until hard
stop, then unscrew
4 turns
anticlockwise
INTERNAL

Alex Broadbent VT/QQ

•
When reinstalling front drop glass ensure tape
is applied at 10mm from front edge and align
this with the previously set quarter glass
division bar.

Example of incorrect fitment:
10mm intrusion into division bar seal
not achieved. Only 6mm seen, front
and rear side glasses will be too far
rearwards, potentially clash condition
between rear of rear glass and cant
rail/roof seals

INTERNAL

Alex Broadbent VT/QQ

•

Z-Axis height should only be adjusted by the 4mm
Allen key adjusters as per ELSAPRO
Example: Front drop glass Z axis not adjusted correctly. Bottom of tape was level
with waist rail seal, after slackening pinch bolt (3 in bottom left image) front drop
glass lowered 14mm to where pen marked line is.
Z-axis adjusters (bottom middle and right images) had not been used, pinch bolt had
been slacked and glass lifted out of the regulator to achieve specification. This has a
knock on effect of altering the 10mm division bar intrusion seen in previous slide as
glass is loose and can be accidentally moved in X-axis.
This also creates a risk that the window will bottom out on the cant rail seals rather
than the regulator bump stops meaning that the glass can raise further as the seals
soften over time and affect end stop learning.

INTERNAL

Alex Broadbent VT/QQ

Rear Regulator adjusters 1, 2, 3

•

Adjust the rear window regulator adjusters at the
following points as shown in the following page
Before resetting adjusters remove the 3 13mm
lock nuts (1-3 in image) to allow adjusters to be
fully screwed in without damaging the regulator,
Also ensure black closing panel (see page 12) is not
stopping the regulator from moving when
performing these adjustments.

INTERNAL

Alex Broadbent VT/QQ

•

Adjuster 1

fully screw in clockwise
until hard stop, then
unscrew 9.5 turns
anticlockwise to
achieve 12mm gap as
seen below

INTERNAL

Images for reference, regulator does
not require removal from vehicle

Adjuster 2

fully screw in clockwise
until hard stop, then
unscrew 9.5 turns
anticlockwise to achieve
12mm gap as seen below

Adjuster 3

fully screw in
clockwise until hard
stop, then unscrew 1
turn anticlockwise to
achieve 20mm gap as
seen below

Alex Broadbent VT/QQ

•
After resetting all 3 adjusters leave the locking nuts loose to allow vertical
movement.
Ensure closing panel (item 3) is installed and 10mm nuts (item 2) are
tightened to set regulator height before tightening adjuster locking nuts
(item 1-3 in image on page 10). Ensure regulator is bottoming out on bump
stops when measuring/setting glass height in Z-axis
Proceed with adjusting rear quarter glass into ELSA specification

IMPORTANT
10mm nuts (item 2) must be loosened when
adjusting the 3 regulator adjusters to allow
the regulator to move. Retighten and check
measurements after each adjustment is made

INTERNAL

Alex Broadbent VT/QQ

•
Images show a poor setting.
Circa 6mm at front edge (near wing mirror)
closing up to 2mm at the rear edge.
2mm at rear edge would have been set to
achieve specified flush/2mm underflush profile
condition between front and rear glasses, the
rear quarter glass mirrors this taper condition.
This potentially increases the risk of false anti
trap as rear window/seal does not engage with
front window at the correct angle.
Suggested to set to specification on problem
vehicles as per next slide. If both windows are
set between 4-6mm then the flush/2mm
underflush profile can be easily achieved.

INTERNAL

Alex Broadbent VT/QQ

•
Set waist rail
gapping to between
4-6mm as
mentioned in Glass
setting guide videos
on E-Academy and
also check for
parallelism along
front and rear
windows to
door/quarter.
50mm from edge of
Waistrail seal,
roughly underneath
the Bentley wings.

50mm

INTERNAL

Alex Broadbent VT/QQ

•
When setting front to rear window profile and waist rail measurements ensure that the front
window does not move outboard excessively when the rear window closes as this will increase
current draw on the rear motor during the period where it is monitoring for it’s end stop, excess
current draw in this zone can cause a false anti-trap scenario.
There does need to be some tension between the front and rear glass to seal against the drop
glass seal, zero mm of movement is best.
If more tension is required to resolve a wind noise or water ingress then aim for no more than
0.25mm of outboard movement.

RHF window, front window closed, rear
window open. Note gap

INTERNAL

RHF window, front window closed, rear
window closed. Note gap, over 0.25mm
outboard movement, this is incorrect

Alex Broadbent VT/QQ

Windows should enter cant rail seal
smoothly, making contact with inboard edge
first and then be pushed outboard (green
square).
Too far inboard increases the risk of the
cant rail seal pinching, too far outboard will
clash with cant rail brightware (red squares)
For front door, poor door profile is a major
contributing factor here and should be
checked/adjusted if window found to be
entering seal incorrectly

Front window examples
showing correct operation
INTERNAL

Alex Broadbent VT/QQ

After all adjustments have been made and recorded in tables from ELSA workshop
manual section “Side glass - To check”. Door ECU basic settings must be relearnt.
Ensure battery is fully charged and passes battery test in ODIS.
Test window operation in all scenarios, e.g. global open/close, individual window
switches, driver door switches, convenience open/close (where applicable), short
drop functions when opening/closing doors and with convertible roof open/closed if
working on a New GTC.
Finally, ensure vehicle still passes water ingress test and does not have excessive
wind noise, any further adjustments must remain within ELSA specifications.

INTERNAL

Alex Broadbent VT/QQ