NHTSA ID Number: 10177557
Manufacturer Communication Number: LI83.30-P-070309
TSB/Document Date: 2020-07-27
Summary
Air conditioning system may occasionally not cool at outside temperatures >40°C
Air Conditioning System Occasionally Does Not Cool
Correctly At Outside Temperatures Greater Than 40°C
Topic number
LI83.30-P-070309
Version
5
Function group
83.30 Air conditioning
Date
06-15-2020
Validity
Model series 118, 177 and 247 from SOP to clean point
of the manufacturing plant; see list
Reason for change
Addition of model series 247 and the production plant
clean points for the new evaporator
Reason for block
Complaint:
Air conditioning system may occasionally not cool at outside temperatures >40°C
To check whether the vehicle could be affected, check the letter in 11th place in the FIN and then the associated
clean point; there are 5 production plants each with their own clean point.
The letter (11th place) in the FIN indicates the plant, the letters being assigned as follows.
Aquascalientes
(W) - September 4th, 2020
Kecskemét
(N) - February 2nd, 2020
Rastatt
Valmet
(J) - March 2nd, 2020
(V) - February 28th, 2020
Cause:
Currently unknown
Attachments
File
Description
pic.1.jpg
OCP picture
Remedy:
1) Please carry out a quick test and process the fault code.
2) On vehicles with CODE 2U1, check fan and radiator shutters for correct mechanical installation.
3) Check whether connector coupling to radiator shutters is correctly plugged in.
4) If radiator shutters are installed in vehicles without code 2U1, these must be removed.
06-15-2020 5:12 PM
© Copyright Mercedes-Benz
AG
JKANTAR
Page 1/3
5) Remove overhead control panel (OCP) and check that manufacturing date is later than April 6th, 2019 (Pic.1)
6) Connect A/C charging station and compare pressure values on the manometer with the value of pressure sensor
B12/2 in Xentry.
7) If the values differ, replace pressure sensor B12/2.
8) If able to reproduce issue readily: With Xentry Diagnostics, select "A/C control unit", then "Actual values" and "Display measurement values" and click on all options.
so.
Then carry out a measuring drive for approx. 30 min. with the diagnostic device and record the values as you do
9) Extract the refrigerant, note down the amount of refrigerant extracted and re-charge with 590 g of R134a.
10) When changing the fill quantity to 590 g for R134a, select the appropriate information label from the XENTRY
Portal parts procedure and attach it to the radiator crossmember/hood.
11) If complaint persists after reducing refrigerant charge: Submit the case through PTSS, stating the original refrigerant quantity, the manufacturing date of the OCP, the customer's AAC settings (when the problem occurs) and the
measurement values recorded.
Symptoms
Body / Air conditioning / Air conditioning / Insufficient cooling output
Parts
Part number
ES1 ES2 Designation
A 000 817 83 02
Quantity Note
AC Label w/ 590g Charge
1
EPC
Replacement label with 590g charge
indicated used when refrigerant charge is reduced.
X
Operation numbers/damage codes
Op. no.
Operation text
Time
Damage
code
Note
83431 F7
Validity
Vehicle
Engine
A (177)
*
*
CLA (118)
*
*
Attachments
06-15-2020 5:12 PM
© Copyright Mercedes-Benz AG
JKANTAR
Page 2/3
pic.1.jpg:
06-15-2020 5:12 PM
© Copyright Mercedes-Benz AG
JKANTAR
Page 3/3
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TSB/Document ID: LI83.30-P-070309
Replacement Service Bulletin Number:
MFR Communication Date: 2020-06-16
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:APPLIANCE:AIR CONDITIONER
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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