WARNING: This page is about a different car, the 1996 Mercedes-Benz E320 and 1996 Mercedes-Benz E300. However, it is still accessible from the selected car via links, so may be relevant.

Using Adapter Cable (202 589 15 63 00), connect Breakout Box (124 589 00 21 00) to remote control locking control module. See Figure. Measure voltage between terminals No. 3 and 12 at breakout box. Close and lock all doors. If less than one volt exists, go to next step. If greater than one volt exists, check the following and repair as necessary:
- Check wiring. See WIRING DIAGRAMS .
- Replace RCL control module.
- Replace combination control module.
Measure voltage between terminals No. 3 and 12 at breakout box. Unlock vehicle using remote transmitter and keep transmitter button depressed. Vehicle should unlock, 6-8 volts should exist and Green indicator light should flash. If all these conditions are met, deactivation output is okay at this time. If any of these conditions are not met, check the following and repair as necessary:
- Check wiring. See WIRING DIAGRAMS .
- Perform TEST 3 through TEST 5.
- Replace RCL control module.

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.

Safety Warning

Test 8: RCL Control Module Deactivation Output

Use the Manual With the Right Hardware

When to See a Mechanic