Check Fuel High Pressure Circuit - AR07.03-P-1010-04MM

WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.

Engine 133, 139, 152.9, 157, 176, 177, 178, 254.9, 256.9, 260, 264, 270, 274, 276, 278, 282

Check fuel system for leaks after repair work on high-pressure fuel circuit.

A damaged fuel system can lead to leakage and personal injury, damage to property or to the environment.

Engine 270, 274 in model 117, 156, 172, 176, 204, 207, 246 with code 924 (Bivalent natural gas drive)

After exchanging fuel system components, use the vehicle diagnosis system to perform an initial startup procedure. Also perform an engine test run of approx. 1 min without load at an engine speed of 1500 to 2000 RPM.

After connecting the vehicle diagnosis system carry out the following steps:

Menu items

Vehicle selection →

Drive →

ME-SFI [ME] control unit (MED40CNG) →

Actuation - selection of the operating mode

Then follow the menu guidance and process.

After exchanging fuel injectors perform a mixture adaptation using the vehicle diagnosis system.

After connecting the vehicle diagnosis system carry out the following steps:

Menu items

Vehicle selection →

Drive →

Control unit →

Complete list of guided tests →

Check fuel high-pressure circuit after doing repair work

Then follow the menu guidance and process.