seat rail during certain production periods.
If the washer is left out when the seat is
reinstalled the seat:
o may intermittently not latch when
returning from the EZ entry position.
o This can influence the cam interlock
functioning.
There may be one or more washers added as
follows:
G05/G07 vehicles produced from 6/24/19 to
10/1/19 Drivers side seat see SI B52 04 19.
G05/G07 vehicles produced from 6/24/19 to
10/1/19 Passengers side seat see SI B52 19 19.
G05 produced from 8/1/22 to 10/1/22 Passenger
side seat see SI B52 06 22.
Cam Interlock on latch

At the seat bottom latch there is an interlock cam
(circled) that turns to actuate a microswitch when
the seat is unlatched and tilted forward.
This picture shows the cam that is attached to
the seat latch assembly.
• This cam is moved when it contacts the
tab mounted on the seat rail
Note: If the cam jams against the tab when the
seat is moved back from the Easy Entry position:
o see above information about washers
used on some vehicles.
If this vehicle does have the washer as noted
above or the washer is not needed by production

date, then see SI B52 04 22 for instructions to
modify this cam.
When this occurs a Check Control Message
(CCM) “Left rear seat back unlocked” comes
up in the display.
Fault codes may be set in the Air Bag Control
Module (ACSM6) and Body Domain Controller
(BDC):
ACSM6 930D6E Backrest Sensor left 2nd seat
row defect;
BDC 804990 locking 2nd seat row left, Easy
Entry: locking state not plausible

Cam Interlock on rail

The matched section of the cam interlock is
located on the seat rail. This tab (shown raised)
contacts the interlock when the seat is lowered to
its normal seating position.
The spring lock beveled star washer (circled; P/N
52 20 5A37D37) must keep contact on the
spring, or the tab can move out of position
damaging the cam interlock.
For more details see the attached video
• B52 02 19 - G05-G07 Seat
Troubleshooting 7 Passenger

Cam interlock Microswitch

Here is the microswitch location (circled) for the
cam interlock.
Replacement microswitch with plastic cap for the
60/40 seat is P/N 52 20 5A37D34.

Crash lock Spring correct

On the side of the seat at the pivot there is a
crash lock spring.
• This spring keeps the latch spring loaded
so it won’t release in case of an accident
The spring is shown in the correct position.

Crash lock Spring incorrect

Here the spring is out of its correct position.

not OK

Seat Manual Release 1

The seat can be manually released in case of
electrical failure to access the third row seats.
This is located at the outer pivot point on each
side of the 2nd row seat.

Seat Manual Release 2

The seat release (red) is for the third row
passenger to actuate, enabling exiting the
vehicle in case of electrical failure.

REPLACEMENT SEAT COMES IN SHIPPING
POSITION #1 / SEAT STUCK IN FOLDED
POSITION
The second-row seat is shipped in a folded-flat
position. When in this shipping position, the
manual releases detailed above will not work.
The manual release will only allow the seat to
fold. To unfold the seat it must be either
electrically (#1) or mechanically (#2) turned at
the backrest pivot
Reference the attachment to SI B52 05 20 and
power the seat backrest motor directly with a
drill battery and connector (V cable 612 160) to
open/unfold the backrest. Once the backrest
has been powered open, the manual release
cables will then allow the backrest to fold.

REPLACEMENT SEAT COMES IN SHIPPING
POSITION #2 / SEAT STUCK IN FOLDED
POSITION
When in this shipping position the seat can also
be unfolded by spinning the circled pivot by
hand using a screwdriver.
This pivot can be accessed after removal of the
T25 screw.

16 point Seat Mounting bolts

16 point special tool(s)

The seats are mounted with a new style 16
point internal bolt.
• Always replace the bolt after removal
Torque to 42 Nm

For the new style 16 point internal seat
mounting bolts use either:
•

Wheel lock kit P/N 83 30 0 492 518: use
the #32 socket

•

A special tool P/N 36 13 6 765 545

60/40 Seat Rail Torque Sequence
•
•
•
•
•

Seat must *NOT* be in Easy Entry
position during the fastener torquing
Seat must *NOT* be fully forward when
torquing the fasteners
See information above about washers
used under the seat rail
Always replace the bolt after removal
Tighten all fasteners to 42 Nm following
the torque sequence

Third Row manual seats
Upright position

A – Third Row Seats in upright position

Drivers seat folded down

B – Third Row Seats with Drivers side folded
down.

Third Row Power Seats
Seat overview

C-pillar mounted switch block

The buttons (S311 and S312) to control the
third row seats are located on the C-pillar.
•

Pulling the button lowers the seatback

Motor for head restraint fold and latch release

•

Pushing the button raises the seatback

•

The small recess above the buttons is
there to assist in entering the 3rd row

•

Wiring Schematics for these motors can
be found under “Electric seats 6 seats”

In each seat backrest there is one motor that
controls 3 Bowden cables.
•

•

•

Cables for head restraint fold / latch release

One of the cables controls the head
restraint folding. Once pulled, the
headrest will release and pivot
downwards.
Raising the headrest back into the
upright position must be done by
pushing up on it by hand
The other two cables control the latch
release at the seat pivot to enable the
seat to fold

The 3 Bowden cables are housed in a common
housing that moves along a worm gear
assembly.
• When the electric motor activates, it
spins the worm gear to pull up on the
housing so that all 3 cables move
simultaneously.
• There is a hall effect sensor built in

•
•

These motors, M383 (driver) and M384
(passenger) are controlled by the
second-row seat modules.
Wiring Schematics for these motors can
be found under “Electric seats 6 seats”
or “Seat Adjustment driver’s side, rear” /
“Seat Adjustment passenger’s side,
rear”.

For more details see either attached video:
• B52 01 19 - G05/G07 Seat
Troubleshooting 6 Passenger
• B52 02 19 - G05/G07 Seat
Troubleshooting 7 Passenger
For diagnosis of the head restraint and/or
backrest of the third seat row see Service
Bulletin B52 09 20.

The wire harness going to the electric motor for
the Bowden cables is supposed to be routed
underneath the Bowden cables to keep the
cables from vibrating against the back metal
panel causing a noise concern.
If necessary, unplug electrical connector, route
harness between Bowden cable and metal seat
backrest assembly. Reconnect electrical
connector.

Cable routing UP TO February 2023 shown.
NOTE: A Bowden cable routing change was
made in the third seat row backrest. This
change was implemented starting in February
2023 production.
Replacement parts are all the new shortened
design cable and require a new routing to install
in vehicles produced prior to February 2023.
See Service Bulletin B52 14 23

Cable routing FROM February 2023 shown.

Headrest Manual Release

There is a manual pull release to fold the
headrest(s) located under the headrest.
NOTE: To remove the rear seat headrest
assembly, you must remove the headrest
leather cover. This cover will be destroyed
during removal and will have to be replaced.
Some parts replacement of the seat can be
done without removal of the headrest. For
example, if replacing the seatback frame
assembly there is no need to separate the head
restraint from the guide rod assembly. Once
the seat cover is released from the original
frame, you can easily raise the seat cover and
cushion as one assembly to gain access to the
two retaining bolts of the guide rod assembly to
the frame and remove the complete assembly
without damaging the head rest restraint, hence
it’s not necessary to replace the head restraint.

Headrest Mounting Bracket

The metal bracket that holds the headrest
assembly is welded to the seat backrest
assembly.

If any of the welds did not penetrate well this
bracket may make noise.
Replace seat frame assembly if necessary.

The rear panel of the third-row seat is
additionally held in place with adhesive strips.
Make sure to use the required adhesive tape
when installing the rear panel on the backrest
using P/N 83 19 0 445 309

Seat Folding Motor

At the seat pivot point of each seat backrest
there is one motor that folds the seat up / down.
• There is a hall effect sensor built in
•

These motors, M371 (driver) and M372
(passenger), are controlled by the
second-row seat modules

•

Wiring Schematics for these motors can
be found under “Electric seats 6 seats”
or “Seat Adjustment driver’s side, rear” /
“Seat Adjustment passenger’s side,
rear”

•

Compression Spring (LH IB shown)

Folding of the seat backrest must be
done using the button(s) via
motorized controls and cannot be
moved manually by hand or this will
cause damage to the motor for
backrest movement.

Compression springs are required for the
electric fold function and to fully seat the latch
assembly. An improperly positioned or missing
compression spring prevents the seat backrest
from locking completely.
Reference B52 05 22 for further information.

Compression Spring location (LH view)

Compression Spring location (RH view)

D Pillar mounted switch block location

The buttons (S273) to control both the 2nd and
3rd row seats are in the cargo area of the
vehicle on the driver’s side.

•

Wiring Schematics for this switch block
can be found under “Luggage
Compartment Switch Block”

There is a slight delay from when the buttons
are pressed until the seats move. If a button is
pressed before seat movement is finished it will
stop the seats operation.

D Pillar mounted switch block

1. MAX Buttons
• Top button – Moves all 4 seats to the
maximum seating position. All seats
move upright, 2nd row moves forward to
allow max legroom for all passengers
• Bottom button – Moves all 4 seats to
the maximum cargo position. The thirdrow seats fold flat. The second-row
seats operation will vary depending
upon options. 60/40 Bench Seat will fold
flat. Captains Seats will move forward
but don’t fold flat
2. These buttons are for the 3rd row seats.
• Push to fold seats down; headrest will
fold down
• Pull to raise seats up; headrest will not
return to up position. They must be
manually moved by hand to the up
position.
3. These buttons are for the 2nd row seats.
• Push to fold seats down
• Pull to raise seats up
•

The second-row seats operation will
vary depending upon options:

•

60/40 Bench Seat will fold flat

Captains Seats will move forward but don’t
fold flat
We have released numerous Service Information Bulletins to address various customer concerns:
First Row Seats (All Models):
• For various noises from the front seats see SI B52 05 19
• For a seat cover that comes off the thigh support see SI B52 10 19
• For noises from the front seat headrest during operation see SI B52 13 19
• For seat occupancy mat (CIS) warnings on vehicles produced up to 9/2018 see SI B72 04 17
• For information on seat rail end stops see SI B52 01 21

•

Visible stitching on first row sport seat back, see SI B52 11 23

Second Row 60/40 electronically adjusted seat (All Models):
• For creasing or ripples in the 2nd row 60/40 Bench Seat please reference SI B52 03 19
• The seats received revised software August 2019. Updating earlier vehicles to the newer SW
can prevent some faults from occurring, see SI B52 17 19
• For a 2nd row 60/40 Bench Seat in G05/G07 vehicles produced from 6/24/19 to 10/1/19 that
intermittently wont latch we have two production-based bulletinso For the Drivers side seat see SI B52 04 19
o For the Passengers side seat see SI B52 19 19
• For a 2nd row 60/40 Passenger bench seat in G05 vehicles produced from 8/1/22 to 10/1/22
that intermittently wont latch, see SI B52 06 22
• For a 2nd row 60% left side seat that stops moving before reaching the home position, CCM
“Left rear seat back unlocked”, faults set in the ACSM and BDC- see SI B52 04 22
• Backrest misalignment of 60/40 second row seat SI B52 05 20
• Noise from 40% seat when returning from EZ entry position, see video Trim Interference
Noise V520121
• The latch mechanism mounting nuts were replaced in some 2021 vehicles under service
action rework seat mechanism 2nd row seat B52 05 21
• For a scratching noise coming from the 2nd seat row during seat operation, see SI B52 03 22
• There is a software update available for “Seat not locked CCM”, S18A-22-11-530 or
higher, see SI B52 09 22
• Second seat row blocking access to third seat row, program seat modules, see SI B52
03 23
Second Row 60/40 mechanically adjusted seat (G05 / G06):
• For various noises from the 2nd row seat see SI B52 06 19
Third Row seat G07:
• For headrest(s) or third row seat(s) that doesn’t fold see B52 09 20
• For a third-row seat that the latch doesn’t fully lock see Recall 22V-670 / B52 05 22
• For third seat row backrest Bowden cable length/routing cable change see SI B52 14 23
All Seats (All Models):
• Software improvements come August 2019 which changes certain seat operations. For a
detailed list of the changes see SI B52 21 19
• All G05 / G07 produced up to August 1, 2019, can be updated to 7/2019 SW as per Service
Action SI B65 19 19
Videos available on TIS:
• B52 01 19 - G05/G07 Seat Troubleshooting 6 Passenger
• B52 02 19 - G05/G07 Seat Troubleshooting 7 Passenger
ATTACHMENTS: See attached Seat Guide on operating the seats

PARTS INFORMATION

Obtain and confirm the part numbers for your specific vehicle by entering the chassis number in either
ETK or AIR which considers specific equipment and/or options.
Part Number
52 20 5A37D34
52 20 5A37D37
52 20 9872574
52 10 7454056
52 10 7469879

Description
Spare part kit microswitch
(Washer) Spare part kit EE window
(Bolt) Repair set armrest
Flexible shaft and small parts (Upper
Backrest adjustment motor LKV)
(Seat End Stop) Spacer

Quantity
1
1
1
1
1

83 19 0445309
52 10 7 314 203
07 14 9 321 690
07 11 9 908 419

Double-Sided Adhesive Tape GT 6008 P
Flexible Shafts and small parts (Forward /
Back adjustment motor SLV)
(Bolt) Holds seat adapter to seat frame
(Business/Captain seats – 4 per seat)
(Bolt) Holds seat bottom to seat backrest
(Business/Captain seats – 4 per seat)

1
1
4
4

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