Mercedes-Benz Mercedes A-Class 2004-2012 Fuel System Specifications

The 2004-2012 Mercedes A-Class is compatible with unleaded petrol (gasoline) with an octane rating of 95 RON or higher. For diesel variants, ensure the fuel meets EN 590 standards. Using lower-quality fuel can affect engine performance and longevity. Always refer to the owner’s manual for specific fuel recommendations and avoid using additives unless approved by Mercedes-Benz.

The Mercedes A-Class requires regular maintenance every 10,000 to 15,000 miles or annually, whichever comes first. Key tasks include oil and filter changes, brake system inspections, tire rotations, and fluid level checks. It is recommended to follow the manufacturer’s service schedule to ensure optimal performance and avoid costly repairs. Always use genuine or approved parts for replacements.

To replace the fuel filter, first, locate it under the vehicle near the fuel tank. Disconnect the negative battery terminal for safety. Release fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Disconnect the fuel lines and remove the old filter. Install the new filter, reconnect the lines, and secure it. Reconnect the battery and check for leaks.

Poor fuel efficiency can result from clogged air filters, low tire pressure, or malfunctioning sensors. Start by checking and replacing the air filter if necessary. Ensure tires are inflated to the recommended pressure. Use an OBD-II scanner to check for error codes related to the oxygen sensor or fuel system. Regular maintenance and using high-quality fuel can also improve efficiency.

To optimize performance, use high-quality fuel and ensure regular maintenance, including oil changes and air filter replacements. Keep tires properly inflated and aligned. Consider upgrading to performance parts like high-flow air filters or exhaust systems. Avoid aggressive driving and excessive idling to maintain engine health. Regularly update the vehicle’s software if applicable.