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October 13, 2026 Service bulletin

Roof‑mounted air conditioning system HK4 does not cool/cools poorly Complaint Roof‑mounted air...

Mercedes-Benz technical service bulletin LI83_30-N-081008_1_en for 2021-2026 Mercedes-Benz Sprinter 2500, 2021-2026 Mercedes-Benz Sprinter 3500 and 2021-2024 Freightliner Sprinter 2500 and others.

Bulletin number
LI83_30-N-081008_1_en
Component
Structure: body
Summary
Roof‑mounted air conditioning system HK4 does not cool/cools poorly Complaint Roof‑mounted air conditioning system HK4 does not cool/cools poorly. Fault code in HVAC177: B106F87 The left rear blower regulator has a malfunction. Message missing. B107087 The right rear blower regulator has a malfunction. Message missing. Cause Condenser fans of roof‑mounted air conditioning system HK4 are not functioning. The fans themselves have a fault on the circuit board. As a result, an extremely rare interaction of various processes can lead to failure of the fans (software enters an undefined state). Remedy 1. Remove and reinsert the fuse for the condenser fans. 2. Activate the condenser fans via Xentry and check that they are operating correctly.

Owners of these vehicles have filed 9 complaints in the body category.

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