Daimler Truck
North America LLC

SF725-AB
Creation Date: April 2026

Field Service Campaign

Subject: Differential Lock Buzzer

Models Affected
Model Model
Make Model Yr. Start | Yr. End Prod. Start Date Prod. End Date
sae . January 14, January 22,
Freightliner Cascadia 2026 2026 2025 2025

Identifying Feature | Models spec’d with 87B-009 Pneumatic Switches

General Information
On behalf of the entity listed below, Daimler Truck North America LLC (DTNA) is initiating Field Service Campaign SF725
to modify the affected vehicles.

e Freightliner Trucks Division

PROBLEM: The pneumatic switches were not wired to send feedback to the ICUC, so the system cannot activate the
buzzer to alert the driver when the differential lock is engaged.

SOLUTION: The wiring for the Driver-Controlled Differential Lock (DCDL) will be updated by an authorized DTNA Facility.

There are approximately 45 vehicles involved.

Additional Repairs

Dealers must complete all outstanding Recall and Field Service campaigns prior to the sale or delivery of a vehicle. A
Dealer will be liable for any progressive damage that results from its failure to complete campaigns before sale or delivery
of a vehicle.

Owners may be liable for any progressive damage that results from failure to complete campaigns within a reasonable
time after receiving notification.

Please contact Warranty Campaigns for consideration of additional charges prior to performing the repair.

Work Instructions

Please refer to the attached work instructions. Prior to performing the campaign, check the vehicle for a completion sticker
(Form WAR261).

Replacement Parts

If our records show your dealership has ordered any vehicle(s) involved in campaign number SF725, a list of the
customers and vehicle identification numbers will be available on the DTNA Portal via OWL. Please refer to this list when
ordering parts for this field service campaign.

Page 1
Daimler Truck
North America LLC

SF725-AB
Creation Date: April 2026

Field Service Campaign

IMPORTANT - After Repair is Complete:
Write the campaign number on a red completion sticker (WAR261) and attach sticker to the base label (WAR259).

If the vehicle does not have a base label, clean a spot on the appropriate location and attach a base label prior to
attaching the completion sticker.

Failure to install a completion sticker may result in a chargeback of the campaign claim.

(TBB is exempt from the completion sticker process.)

Table 1 — Replacement Parts

Group Part / Kit Number Part / Kit Description Qty
A 23-13214-302 TERMINAL-FEMALE,PCB,DBL,NIB,0.5-0.8 1ea

B 23-13214-302 TERMINAL-FEMALE,PCB,DBL,NIB,0.5-0.8 2ea

All Groups WAR261 Blank Completion Sticker 1ea

Removed Parts

e For U.S. and Canadian Dealers, use the part disposition to determine how to manage removed parts (return,
scrap, etc.). Dispositions are available at the date of the repair.

e For Export Dealers, destroy removed parts unless otherwise advised.

Claim Reimbursement - Labor Allowance

IMPORTANT: OWL must be viewed prior to performing the Field Service campaign to ensure the vehicle is involved and
the campaign has not been previously completed. Also check for a completion sticker prior to beginning work.

You will be reimbursed for your parts, labor, and handling (landed cost for Export Distributors) by submitting your claim
through the warranty system within 30 days of completing this campaign.

e In OWL, use the ‘Retrieve’ function and select the appropriate procedure. This will auto-populate the PFP,
component code, replacement parts, cause, corrective action, and SRT code.

Table 2 - Claim Reimbursement

Claim Type Field Service Campaign
Campaign SF725 AB
VMRS Component Code | F99-999-005
Cause Code A1 — Campaign
Primary Failed Part 25-SF725-000

Page 2
Daimler Truck : : :
North America LLC Field Service Campaign

SF725-AB
Creation Date: April 2026

Table 3 — Labor Allowance

Time
Group Procedure Allowed SRT Code Corrective Action
(hours)
AB Modify DCDL Switch Wiring 0.7 996-F252A 12-Repair Recall/Campaign

Claims for Credit

e Claim type is Field Service Campaign.

e — Inthe Campaign field, enter the campaign number and group (SF725-A or SF725-B).

° In the Primary Failed Part field, enter 25-SF725-000.

e — Inthe Parts section, enter the appropriate kit or part number(s) as shown in the Replacement Parts Table.

e — Inthe Labor section, enter the appropriate SRT from the Labor Allowance Table. Administrative time will auto-
populate if applicable using SRT 939-6010A for 0.3 hours.

e The VMRS Component Code is F99-999-005 and the Cause Code is A1 - Campaign.

e U.S. and Canada — Reimbursement for Prior Repairs. When a customer asks about reimbursement, please do the
following:

e Accept the documentation of the previous repair.

e Make a brief check of the customer’s paperwork to see if the repair may be eligible for reimbursement. (See
the ‘Copy of Owner Letter’ section of this bulletin for reimbursement guidelines.)

e Submit an OWL Field Service Pre-Approval Request for a decision.

e Include the approved amount on your OWL claim in the Other Charges section.
e Attach the documentation to the pre-approval request.

e lf approved, submit a ‘based on claim’ for the pre-approval.

e The Dealer is required to reimburse the customer the appropriate amount.

IMPORTANT: OWL must be viewed prior to performing the Field Service campaign to ensure the vehicle is involved and
the campaign has not been previously completed. Also check for a completion sticker prior to beginning work.

U.S. and Canadian dealers, if you have any questions, contact the Warranty Campaigns Department by submitting an
inquiry through PNA (PRISM Network Assistant) located in OWL (Online Warranty Link). Export distributors, submit a
PNA Case or contact your International Service Manager.

U.S. and Canadian Dealers: To return excess kit inventory related to this campaign, U.S. dealers must submit a Parts
Authorization Return (PAR) to the Memphis PDC. Canadian dealers must submit a PAR to their facing PDC. All kits must
be in resalable condition. PAR requests must include the original purchase invoice number. Export Distributors: Excess
inventory is not returnable.

The letter notifying U.S. and Canadian vehicle owners is included for your reference.

Please note that the National Traffic and Motor Vehicle Safety Act, as amended (Title 49, United States Code, Chapter
301), requires the owner’s vehicle(s) be corrected within a reasonable time after parts are available to you. The Act states
that failure to repair a vehicle within 60 days after tender for repair shall be prima facie evidence of an unreasonable time.
However, circumstances of a particular situation may reduce the 60-day period. Failure to repair a vehicle within a
reasonable time can result in either the obligation to (a) replace the vehicle with an identical or reasonably equivalent

Page 3
Daimler Truck - - -
North America LLC Field Service Campaign
SF725-AB

Creation Date: April 2026

vehicle, without charge, or (b) refund the purchase price in full, less a reasonable allowance for depreciation. The Act
further prohibits dealers from selling a vehicle unless all outstanding recalls are performed. Any lessor is required to send
a copy of the recall notification to the lessee within 10 days. Any subsequent stage manufacturer is required to forward
this notice to its distributors and retail outlets within five working days.

Page 4
Daimler Truck
North America LLC

SF725-AB
Creation Date: April 2026

Field Service Campaign

Copy of Notice to Owners

Subject: Differential Lock Buzzer

Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, is initiating Field Service
Campaign SF725 to modify specific model year 2026 Freightliner Cascadia vehicles, manufactured January 14, 2025 to
January 22, 2025.

The pneumatic switches were not wired to send feedback to the ICUC, so the system cannot activate the buzzer
to alert the driver when the differential lock is engaged.

The wiring for the Driver-Controlled Differential Lock (DCDL) will be updated by an authorized DTNA Facility.

Please contact an authorized DTNA dealer to arrange to have the campaign performed and to ensure that parts are
available. The campaign will take approximately 1 hour and will be performed free of charge. To locate an authorized
dealer go to https://northamerica.daimlertruck.com/brands/support. At the bottom of the page click on the appropriate
brand (shown as an icon), and at the top of each brand’s page is an option to ‘Find a Dealer’.

This Field Service Campaign will terminate on April 30, 2027. Please make sure the campaign is completed prior to this
date. Work completed after this date will be done at the customer’s expense.

As stated in the terms of your express limited warranty, Daimler Truck North America LLC will not pay for any damage
caused by failure to properly maintain your vehicle. Daimler Truck North America LLC considers the work necessary
under this campaign to be proper maintenance and, therefore, will not pay for any damage to your vehicle caused by your
failure to have the repairs that are the subject of this campaign performed in a reasonable time.

If you have any questions, contact the Warranty Campaigns Department at (800) 547-0712, from 7 a.m. to 4 p.m. Pacific

Time, Monday through Friday, e-mail address: [email protected], or contact the Customer
Assistance Center at (800) 385-4357.

WARRANTY CAMPAIGNS DEPARTMENT
Enclosure

Page 5
Daimler Truck
North America LLC

SF725-AB
Creation Date:

Field Service Campaign

April 2026

Work Instructions

Subject: Differential Lock Buzzer

Models Affected
Model Model Prod. Prod.
Make Model Yr. Start | Yr. End | Start Date | End Date
January January
Freightliner Cascadia 2026 2026 14, 22,
2025 2025
Identifying Feature | Models spec’d with 87B-009 Pneumatic Switches

SF725 — Modifying DCDL Switch Wiring

1.

P

Check the base label (Form WAR259) for a completion sticker for SF725 (Form WAR261), indicating this work has
been done. The base label is usually located on the passenger-side door, about 12 inches (30 cm) below the door
latch. If a completion sticker is present, no work is needed. If a completion sticker is not present, proceed to the next
step.

Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
Disconnect the batteries.

Remove the electrical bay cover. For instructions, see Group 60: 7.1 Removal of the Dash Panels and Top Cover
in the New Cascadia Workshop Manual. Use the access opening to reach the electrical harness.

Remove the DCDL switch from the dash.

age 6

Daimler Truck : : :
North America LLC Field Service Campaign

SF725-AB
Creation Date: April 2026

6. Remove the white connector from the back of the switch. See Fig. 1.

#549075

03/11/2026

Fig. 1, Removing the Connector from the Switch

Page 7
Daimler Truck
North America LLC

Field Service Campaign

SF725-AB
Creation Date: April 2026

7.

10.

11.

Locate the splice packs containing the green wires. See Fig. 2.

03/11/2026 / 549077

Fig. 2, Locating the Splice Packs

Identify a wire matching the gauge of the green wires in the splice pack and long enough to reach from the splice pack
to the white connector for the DCDL switch. Install the terminal from the kit on one end of the wire.

Insert the terminal into an open cavity at the rear of the splice pack.

Identify the wire routed from connector cavity B at the rear of the disconnected connector. This wire should be green.