Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Activating Components And Functions
This function can be used to activate components and functions which affect the outputs on the rear electronic module (REM).
The following components can be activated:
- activation of relay, simultaneous rear locking (rear doors and filler cap).
- activating the relay, left rear door locking
- activating the relay, left rear door unlocking
- activating the relay, deadlock for the rear doors
- activating the relay, right rear door locking
- activating the relay, right rear door unlocking
- activating the relay, rear folding head restraint
- activating the relay, tailgate pop-up
- activating the relay, fuel tank filler cap locking
- activating the relay, fuel tank filler cap unlocking
- activating the relay, rear fog lamp
- activating the relay for the rear fog lamp, German version and trailer
- activating the relay, back-up (reversing) lamp
- activating the relay, rear windshield heating
- activating the relay, tailgate wiper (5 doors)
- activating the relay, extended X-supply
- activating the relay, 15I power supply
- activating the relay, gas tank valve (CNG, Bi-fuel)
- activating the relay, rear A/C
- set assumed fuel level in the left tank half (10, 20, 30 or 40 liters)
- set assumed fuel level in the right tank half (10, 20, 30 or 40 liters)
- set assumed information about bulb failure monitoring (lamp fault)
- activating and deactivating the inclination sensor module (ISM)
- check "sleep mode" ("wake up" or "enter sleep"), inclination sensor module (ISM)
- assumed signal from the handle, tailgate pop-up
- activate the rear electronic module (REM) alarm trigger
- activate the cargo compartment lighting
- activate the back-up (reversing) warning.
This function can be used to activate components and functions which affect the outputs on the rear electronic module (REM).
The following components can be activated:
- activation of relay, simultaneous rear locking (rear doors and filler cap).
- activating the relay, left rear door locking
- activating the relay, left rear door unlocking
- activating the relay, deadlock for the rear doors
- activating the relay, right rear door locking
- activating the relay, right rear door unlocking
- activating the relay, rear folding head restraint
- activating the relay, tailgate pop-up
- activating the relay, fuel tank filler cap locking
- activating the relay, fuel tank filler cap unlocking
- activating the relay, rear fog lamp
- activating the relay for the rear fog lamp, German version and trailer
- activating the relay, back-up (reversing) lamp
- activating the relay, rear windshield heating
- activating the relay, tailgate wiper (5 doors)
- activating the relay, extended X-supply
- activating the relay, 15I power supply
- activating the relay, gas tank valve (CNG, Bi-fuel)
- activating the relay, rear A/C
- set assumed fuel level in the left tank half (10, 20, 30 or 40 liters)
- set assumed fuel level in the right tank half (10, 20, 30 or 40 liters)
- set assumed information about bulb failure monitoring (lamp fault)
- activating and deactivating the inclination sensor module (ISM)
- check "sleep mode" ("wake up" or "enter sleep"), inclination sensor module (ISM)
- assumed signal from the handle, tailgate pop-up
- activate the rear electronic module (REM) alarm trigger
- activate the cargo compartment lighting
- activate the back-up (reversing) warning.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.