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March 7, 2025 Service bulletin

Check engine light on. Engine in limp-home mode

Mercedes-Benz technical service bulletin LI07.70-P-078520 for 2022-2024 Mercedes-Benz C300, 2024-2025 Mercedes-Benz E350 and 2023-2025 Mercedes-Benz GLC 300 and others.

Bulletin number
LI07.70-P-078520
Component
Engine
Summary
Complaint Check engine light on. Engine in limp-home mode. Rough running. Low fuel rail pressure fault code P008700 stored in MRG2 control unit. Additional faults below may be stored in MRG2 control unit: Misfire- P030000, P030100, P030200, P030300, P030400, P030084, P030004 Mixture adaptation- P217800 P218762, P017100, P017200, P217700 Injector malfunction- P02EE00, P02EF00, P02F000, P02F100, P214601, P214901 Cause Gas bubbles forming in low pressure fuel system due to fuel boiling. Remedy -Check engine control unit N3/10 for software update. -Proceed with software update if new software version 2549032303, 2549032403, 2549032503 or 2549032603 are found. -Clear faults and check for any symptoms on road test Do not replace hardware unless clear part malfunction is determined

Owners of these vehicles have filed 104 complaints in the engine category.

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