1. Wiper Linkage Issue:
- Check the wiper linkage mechanism under the hood for any obstructions, damage, or loose connections. Ensure that the linkage moves freely without any binding.
2. Wiper Motor:
- While someone operates the wiper switch, check if the wiper motor shaft is turning. If the motor is not running, it could be faulty and may need replacement.
3. Wiper Switch:
- Inspect the wiper switch on the steering column for any damage or loose connections. Try operating the switch multiple times to see if the wipers start working.
4. Faulty Wiring:
- Check the electrical wiring that connects the wiper switch, wiper motor, and fuse box. Look for any broken or loose wires that could cause a circuit interruption.
5. Blown Fuse:
- Locate the fuse responsible for the windshield wipers in the fuse box. Check the fuse for any damage or blown connections. Replace the fuse if necessary.
6. Relay Switch:
- If your vehicle has a relay switch for the wipers, check its condition and replace it if faulty. The relay switch is usually located near the fuse box.
7. Electronic Control Unit (ECU):
- In some Mercedes models, the wipers are controlled by an ECU. If none of the above solutions work, the ECU may be experiencing issues. Check with a qualified mechanic to diagnose any ECU problems.
8. Faulty Wiper Motor Assembly:
- If all other components check out, the wiper motor assembly itself could be faulty. This typically requires replacement.
9. Blocked Windshield Wiper Nozzles:
- If the wiper arms move but do not clear any water from the windshield, check if the windshield wiper nozzles are blocked or clogged. Clean or replace the nozzles if needed.
Remember that some car models may have specific wiper-related issues, so it's essential to consult a reliable mechanic or service manual for your 1999 Mercedes C280 for model-specific troubleshooting steps and repairs.
