Monday, July 8, 2019

Mercedes-Benz A220 2020 Technical Service Bulletin # LI83-00_P-048144 Date: 091208


A/C - Knock Noise From The Glove Box Area



NOISES FROM VICINITY OF GLOVE BOX



Topic number LI83.00-P-048144



Version 1



Design group 83.00 General



Date 12-08-2009



Validity Model series 204



Reason for change Content updated to provide more detail / Supersedes



DTB P-B-83.30/122a



Reason for block



Complaint:



1. Knocking/thumping noises or



2. Cracking/clicking noises from vicinity of glove box



Cause:



1. The knocking/thumping noise can be heard, for example, in stop-and-go traffic. In this case, the fresh air/recirculated air/back pressure flap



knocks against the housing and causes this noise.



2. The cracking/clicking noise is caused by the springs of the fresh air/recirculated air/back pressure flap. This can also be heard in stop-and-go



traffic.



Remedy:



Mercedes-Benz A220 2020 Page 329



On vehicles produced before November 2007, proceed as follows for point 1.



Remove the cover under the instrument panel (AR68.10-P-1520CW), then disassemble the glove box (AR68.10-P-1200CW).



After removing the glove box, the housing of the fresh air/recirculated air/back pressure flap is visible. Remove the cover of the fresh air/recirculated



air housing



Remove the existing guide pin (2 ea.), cut them off using side cutting pliers.



See pictures in attachment



On vehicles produced before November 2007, proceed as follows for point 2.



Remove the cover under the instrument panel (AR68.10-P-1520CW), then disassemble the glove box (AR68.10-P-1200CW).



Remove the old springs by unhooking them from the lower attachment, then turn through 90锟斤拷, then detach the springs. Install new springs in reverse



order, the retaining points of the springs must be greased. See attachment, spring description



Actuate using DAS, perform a listening test on the springs of the fresh air/recirculated air/back pressure flap under menu items: Air conditioning /



Actuation / M2/5 (fresh air/recirculated air flap actuator motor)



Attachments



Symptoms



Parts



Work Units



Mercedes-Benz A220 2020 Page 330



Validity



Attachment - Fresh Air Flap 1



Attachment - Fresh Air Flap 2



Mercedes-Benz A220 2020 Page 331



Attachment - Pictures of Spring Exchange



Mercedes-Benz A220 2020 Page 332



Attachment - Cover of fresh Air/Recirculated Air Flap

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