1. Check the Turn Signal Bulbs:
- Open the hood of your 190E.
- Locate the turn signal assemblies on both the front and rear of the vehicle.
- Check if any of the turn signal bulbs are burned out.
- Replace any faulty bulbs with new ones of the correct type.
2. Inspect the Turn Signal Switch:
- The turn signal switch is located on the left side of the steering column.
- Check if the turn signal switch is loose or damaged.
- If necessary, tighten the switch or replace it with a new one.
3. Check the Turn Signal Relay:
- The turn signal relay is located in the fuse box under the hood.
- Remove the relay and check if its contacts are clean and free from corrosion.
- If necessary, clean the contacts or replace the relay with a new one.
4. Check the Wiring:
- Carefully inspect the wiring related to the turn signals. Look for any loose, damaged, or corroded wires.
- If you find any issues with the wiring, repair or replace the affected wires.
5. Test the Turn Signals:
- Once you have completed the above steps, test the turn signals to ensure that they are working properly.
- Turn on the hazard lights and check if all four turn signals are blinking simultaneously.
- Additionally, test the turn signals by turning the steering wheel to the left and right to activate the respective turn signals.
By following these steps, you can troubleshoot and fix the turn signal issues in your 84 Mercedes Benz 190E. If the problem persists or if you are not comfortable performing these checks and repairs, it's best to consult a qualified mechanic for assistance.