NCU-2023060003

News Channel Update |
Vehicle Compliance and Analysis
TO: Mercedes-Benz Dealer Principals, General Managers, Sales
Managers, Service Managers, Parts Managers
RE: Emission Service Campaign 2023060003 Notification
Perform Software Update to Air Conditioning Control Unit
FROM: Gregory Gunther, Department Manager, Vehicle
Compliance and Analysis, Engineering Services
DATE: June 15, 2023
IMPORTANT NEW EMISSION SERVICE CAMPAIGN INFORMATION
Please note that all customer inquiries should be directed to the Customer Assistance Center at 1-800-FOR-MERCEDES.
Sincerely,
Gregory Gunther
Department Manager, Vehicle Compliance & Analysis
Mercedes-Benz USA, LLC
One Mercedes-Benz Drive
A Mercedes-Benz Group AG Company
Sandy Springs, GA 30328
770.705.0600
News Channel Update |
Vehicle Compliance and Analysis
June 15, 2023
Emission Service Campaign Notification
Campaign No. :
Campaign Desc. :
2023060003
21P5499508
Perform Software Update to Air
Conditioning Control Unit
This is to notify you of an Emission Service Campaign to perform software update to air conditioning control unit on 9,119 Model Year
("MY") 2016 – 2021 C-Class (205 platform), E-Class (213 platform) and GLC (253 platform) vehicles. The affected vehicles will be visible and
flagged in VMI as "OPEN" on June 16, 2023.
Background
Issue
Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that on
certain Model Year (“MY”) 2016 – 2021 C-Class (205 platform), E-Class (213 platform) and GLC
(253 platform) vehicles, the air conditioning control unit software may not meet production
specifications. There is a possibility that a stuck open thermostat may wrongly be detected
causing the check engine Malfunction Indicator Lamp (‘MIL’) to illuminate.
What We’re Doing
MBUSA will conduct an Emission Service Campaign. An authorized Mercedes-Benz dealer will
perform a software update to the air conditioning control unit on the affected vehicles.
Parts
Parts are not required for this campaign since the remedy is software based
Vehicles Affected
Vehicle Model Year(s)
2016 - 2021
Vehicle Model
C-Class, E-Class and GLC
Vehicle Population
9,119
Total Campaign Population
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.
Mercedes-Benz USA, LLC
One Mercedes-Benz Drive
A Mercedes-Benz Group AG Company
Sandy Springs, GA 30328
770.705.0600
2
Campaign No. 2023060003, June 2023
TO:
ALL MERCEDES-BENZ CENTERS
SUBJECT:
Various Models
Model Year 2016 - 2021
Perform Software Update to Air Conditioning Control Unit
Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that on certain
Model Year (“MY”) 2016 – 2021 C-Class (205 platform), E-Class (213 platform) and GLC (253
platform) vehicles, the air conditioning control unit software may not meet production specifications.
There is a possibility that a stuck open thermostat may wrongly be detected causing the check
engine Malfunction Indicator Lamp (‘MIL’) to illuminate. An authorized Mercedes-Benz dealer will
perform a software update to the Air Conditioning Control Unit on the affected vehicles.
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 9,119 vehicles are affected.
Order No. P-SC-2023060003
2
Perform Software Update to Air Conditioning Control Unit
 Always use the latest XENTRY Diagnosis software release with all available add-ons.
 Make sure to follow the operation steps exactly as described in XENTRY Diagnosis.
 Use a charger to ensure sufficient power supply to the vehicle’s on-board electrical system battery
(greater than 12.5 V).
 If XENTRY Diagnosis is already connected to the vehicle, start with Work Procedure step 2.
If two or more software updates or SCN codings are performed during a single workshop
visit, operation items 02-4762 and 02-5058 may be invoiced
only on one of the workshop orders.
Work Procedure
1. Connect XENTRY Diagnosis.
2. Update automatic air conditioning (AAC) control unit software
To do this, select menu item "Quick test view – N22/1- automatic air conditioning (AAC) - Adaptations – Control
unit update – Update of control unit software".
Then follow the user guidance in XENTRY Diagnosis.
3. Disconnect XENTRY Diagnosis.
__________________________________________________________________________________________________
Note: The following allowable labor operation should be used when submitting a warranty claim for this repair:
Warranty Information
Damage
Operation
Code
Number
02-9334
54 995 08
02-4762*
02-5058*
*
Description
Update automatic air conditioning (AAC) control unit software
(with XENTRY Diagnosis connected)
Connect/disconnect diagnostic system
(XENTRY Diagnosis)
Connect/disconnect starter battery charger
(with XENTRY Diagnosis connected)
Labor Time
(hrs.)
0.1
0.1
0.1
Invoice operation item only once for each workshop order.
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.
P-SC-2023060003