Introduction
C2C and C2C+ Stop/Start, Power Take Off, CAN Breakout for 2025 Sprinter (907)
The C2C module is a plug & play module designed to plug into the Mercedes designated up-fitter access point underneath driver side seat (PSM harness) and has the following feature set:
- Stop/start with external triggers or over data
- Variable idle control
- CAN breakout with inputs/outputs for partitioned integration to the vehicle
- External CAN transport for communication to a control module or GUI
The plug and play harness connects to the PSM harness, which can be found underneath the driver side seat
Electrical specs:
Current draw:
Awake = 42mA
Sleep = 2mA
© 2025. Mid City Engineering. All Rights Reserved.
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There is a battery quick disconnect that should be used to disconnect the chassis battery ground before performing this bypass. Mercedes recommends waiting at least 20 minutes after vehicle shutdown to disconnect battery.
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The battery disconnect instructions are for general reference only. For instructions and chassis specific details, refer to your vehicles owner manual before performing this disconnect.
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Remove access panel above and to the right of the accelerator pedal
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Battery disconnect is located under the driver side dash to the right of the accelerator pedal
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Locate battery quick disconnect cable behind access panel
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There is a red tab on the top of the disconnect cable. To release the cable from the post, the red tab needs to be pushed downward
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Push the red tab downward to release the cable and pull towards the rear of the cable at the same time to remove cable from post
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Carefully place battery disconnect cable to the side
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Remove driver seat
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Locate PSM harness in area under seat
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If PSM module is plugged in, unplug module from harnessing
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If the vehicle is equipped with an OEM PSM, connect the C2C T-harness to the OEM harnessing and the OEM PSM module as shown
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If the vehicle is not equipped with a PSM module, connect the OEM harnessing to the mating set of of plugs on the C2C harness and leave the other side of the C2C harness disconnected
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Securely mount C2C module underneath driver seat
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The C2C module is equipped with external CAN transport. Connect to EXT CAN high/low wires in schematic for communication via MCE transport CAN protocol
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The C2C module is equipped with several inputs and outputs. Use as needed per schematic
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Reconnect battery disconnect cable from to post from step 2
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Ensure that cable locks into place on post. You should feel the tab lock into place. Once connected, you should not be able to remove cable from post without pressing red tab downward
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Replace access panel
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Open hood and test auto start operation. Auto start should be disabled when hood is open.
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If using high idle, the option must be programmed using the supplied green and green/white CAN harness and the C2C module
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Under the passenger side dash, locate the CAN distribution block with OEM green and green/white wires
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Connect supplied green and green/white CAN wires to any empty spot in the distribution block
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With ignition off, green light on C2C+ module will turn on when programming CAN plug is connected
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Turn ignition on (but do not start engine) by pressing the push to start button 2X
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Green LED on C2C module will flash
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Pull high beam/turn signal stalk towards you and hold for 15 seconds. This will initiate the programming.
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Once programming is complete, the green light will turn solid. Once green light is solid, programming is complete.
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OPTIONAL: The supplied green and green/white CAN harness from distribution block may be disconnected, bundled up, and mount securely with the C2C module (the programming harness does not need to stay plugged into the distribution block).
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© 2025. Mid City Engineering. All Rights Reserved.
© 2025. Mid City Engineering. All Rights Reserved.
