Check Regulation Valve – 2023 Mercedes-Benz GLC

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Mercedes-Benz USA, LLC A Mercedes-Benz Group AG Company
One Mercedes-Benz Drive Sandy Springs, GA 30328 770.705.0600
News Channel Update | Vehicle Compliance & Analysis
IMPORTANT SERVICE CAMPAIGN LAUNCH
Please note that all customer inquiries should be directed to the Customer Assistance Center at 1-800-FORMERCEDES
(1-800-367-6372).
Sincerely,
Gregory Gunther
Senior Manager, Vehicle Compliance & Analysis
TO: Mercedes-Benz Dealer Principals, General Managers,
Sales Managers, Service Managers, Parts Managers
FROM: Gregory Gunther, Senior Manager, Vehicle
Compliance and Analysis, Engineering Services
RE: Service Campaign Launch Notification
Check Coolant Valve
MY23 GLC (254 platform)
DATE: April 19, 2024
Mercedes-Benz USA, LLC A Mercedes-Benz Group AG Company
One Mercedes-Benz Drive Sandy Springs, GA 30328 770.705.0600
News Channel Update | Vehicle Compliance & Analysis
Service Campaign Launch Notification April 19, 2024
Campaign No. : Campaign Desc. : Check Coolant Valve 2024040003 23P8390007
This is to notify you of the Service Campaign Launch to check the regulation valve in 139 Model Year (“MY”) 2023 GLC (254
platform) vehicles. The vehicles will be visible and flagged in VMI as “OPEN” on April 19, 2024.
Background
Issue
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined
that on certain MY 23 GLC (254 platform) vehicles, the regulation valve in the lowtemperature
coolant circuit may become stuck. This would lead to a fault message
in the instrument cluster.
What We’re Doing MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will
check the coolant valve on the affected vehicles and replace it, if necessary.
Parts The remedy is available and can be performed as necessary.
Vehicles Affected
Vehicle Model Year(s) 2023
Vehicle Model GLC
Vehicle Populations
Total Campaign Population 139
Next Steps/Notes
Customer Notification Timeline Customers will receive an in-vehicle notification regarding this campaign.
AOMS/SOMS AOMs – This campaign may generate questions from your dealers.
While we regret any inconvenience this may cause, MBUSA is determined to maintain a high level of vehicle quality and customer
satisfaction. Please refer all customer inquiries to the Customer Assistance Center at 1-800-FOR-MERCEDES.
2
Campaign No. 2024040003, April 2024
TO: ALL MERCEDES-BENZ CENTERS
SUBJECT: Model GLC (254 platform)
Model Year 2023
Check Coolant Valve
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain
MY 23 GLC (254 platform) vehicles, the regulation valve in the low-temperature coolant circuit may
become stuck. This would lead to a fault message in the instrument cluster. An authorized
Mercedes-Benz dealer will check the coolant valve on the affected vehicles and replace it, if
necessary.
Prior to performing this Campaign:
 VMI must be checked before performing campaigns to verify that the campaign is required
on a specific vehicle. Always check for any other open campaigns and perform accordingly.
 Please review the entire Campaign bulletin and follow the repair procedure exactly as
described.
Approximately 139 vehicles are affected.
Order No. P-SC-2024040003
2
P-SC-2024040003
Check Coolant Valve
Check/Test Procedure
1. Connect XENTRY Diagnosis.
2. Check function of coolant directional control valve using XENTRY Diagnosis:
Select menu item “Quick test view → N127 – Control unit “Drivetrain” (PTCU) → Special procedures →
CHECK of switchover valves”.
Then follow the user guidance in XENTRY Diagnosis.
a. Fault message on coolant directional control valve (Y73/1):
Disconnect XENTRY Diagnosis and carry out Work Procedure.
b. No fault message on coolant directional control valve (Y73/1):
Disconnect XENTRY Diagnosis and End Measure.
Work Procedure
1. Replace coolant directional control valve (Y73/1) of low-temperature circuit (Figure 1, 1).
For basic information, see AR09.41-P-0131MRV.
Figure 1: Coolant directional control valve (Y73/1) of low-temperature circuit (1)
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P-SC-2024040003
Primary Parts Information
Qty. Part Name Part Number
1 Regulation valve A 000 506 15 00
Small parts such as screws, lock nuts, sealing rings, cable ties, fluids, sealant, etc. are not listed in the parts list. The
required small parts are taken into account in the budgeting.
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Note: The following allowable labor operation should be used when submitting a warranty claim for this repair:
Warranty Information
Damage
Code
Operation
Number
Description
Labor Time
(hrs.)
83 900 07
12-2043
Perform: Check coolant directional control valve (Y73/1)
Includes: Connect/disconnect XENTRY Diagnosis
0.3
12-2044
Perform: Replace coolant directional control valve (Y73/1) (after check)
Includes: Remove/install lower engine compartment lining, front sections.
Perform bleed routine for coolant circuit.
0.9
Note: Always check Xentry Operation Time (XOT) for the current OP-Code times. Labor times are subject to change
and updates may not be reflected in this document.

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