Rust can be a significant concern for older vehicles. To address rust issues:

1. Inspect Regularly: Check the undercarriage, wheel arches, and body panels for signs of rust.
2. Clean Affected Areas: Use a wire brush to remove loose rust. Apply a rust remover solution if needed.
3. Prime and Paint: Apply a rust-inhibiting primer followed by touch-up paint to protect the bare metal.
4. Protect the Surface: Consider applying a rust-proofing agent to prevent future rust.

Refer to the manual for detailed instructions and tips on rust prevention and repair specific to the 1975 Peugeot 404 D.

Electrical issues can be tricky, but they can be managed with systematic troubleshooting:

1. Check Fuses and Connections: Inspect all fuses and electrical connections for signs of damage or corrosion.
2. Test Battery and Alternator: Ensure the battery is charged and the alternator is functioning correctly.
3. Inspect Wiring: Look for frayed or damaged wiring and repair or replace as necessary.
4. Consult Wiring Diagrams: Use the manual's wiring diagrams to trace and diagnose complex electrical issues.

Detailed electrical troubleshooting procedures are included in the manual to assist you in resolving these problems efficiently.

Carburetor problems can affect engine performance. Follow these steps to address common carburetor issues:

1. Clean the Carburetor: Remove and clean the carburetor, paying special attention to the jets and float bowl.
2. Adjust the Mixture: Ensure the air-fuel mixture is correctly adjusted according to the manufacturer's specifications.
3. Inspect for Leaks: Check for fuel leaks around the carburetor and replace any worn gaskets or seals.
4. Replace Components: If cleaning doesn’t resolve the issue, consider replacing the carburetor or its components.

Refer to the manual for specific carburetor adjustments and repair instructions.

Suspension wear can impact ride quality and handling. To address suspension issues:

1. Inspect Components: Check shock absorbers, struts, and suspension arms for wear and tear.
2. Replace Worn Parts: Replace any damaged or worn suspension components as needed.
3. Check Alignment: Ensure that the wheel alignment is correct to prevent uneven tire wear.
4. Perform Regular Maintenance: Regularly inspect and maintain the suspension system to prolong its lifespan.

The manual provides detailed diagrams and procedures for suspension repairs and maintenance.

Oil leaks are often manageable with proper maintenance:

1. Identify the Source: Inspect the engine and transmission to pinpoint the source of the leak.
2. Replace Seals and Gaskets: Replace any worn or damaged seals and gaskets.
3. Tighten Bolts: Check and tighten any loose bolts that may be contributing to the leak.
4. Clean the Area: Clean the affected area to prevent further contamination and monitor for new leaks.

Consult the manual for detailed guidance on addressing oil leaks specific to your vehicle model.