Dayco 5070788 Serpentine Belt - Fan, Alternator and Air Conditioning or Main Drive

Durable Serpentine Belt for Mercedes-Benz GLS350d and ML350

The Dayco 5070788 serpentine belt is engineered to meet the demanding requirements of Mercedes-Benz GLS350d and ML350 models. Constructed with EPDM and aramid reinforcement, this belt offers reliable performance under a wide range of operating temperatures.

• Material: EPDM with aramid fiber reinforcement for enhanced durability
• Top Width: 0.96 inches
• Effective Length: 78.75 inches (2000.25 mm)
• Outside Circumference: 79.41 inches (2017.02 mm)
• Rib Quantity: 7 ribs with a straight rib profile
• Cross Section: K-section design for optimal fit and function
• Operating Temperature Range: -45°C to 212°F (-42.7°C to 100°C)
• Meets SAE J1459 and SAE J2432 standards

Technical Overview of Dayco 5070788 Serpentine Belt

This serpentine belt is designed specifically for accessory drive belt systems in select Mercedes-Benz vehicles, including the GLS350d and ML350. The EPDM (ethylene propylene diene monomer) rubber compound combined with aramid reinforcement provides excellent resistance to heat, wear, and stretching. The 7-rib K-section profile ensures consistent power transmission to engine accessories such as the alternator, power steering pump, and air conditioning compressor. The belt’s dimensions, including a top width of 0.96 inches and an effective length of 78.75 inches, are tailored to fit the accessory drive system precisely, reducing the risk of slippage or premature failure.

Compatible Vehicles and Applications

This Dayco serpentine belt 5070788 is compatible with the following Mercedes-Benz models:

• Mercedes-Benz GLS350d
• Mercedes-Benz ML350

It is designed to replace worn or damaged belts in the accessory drive system, helping to maintain proper engine function and accessory operation.

Common Issues Addressed by This Serpentine Belt

• Eliminates belt slippage and squealing noises
• Prevents accessory drive system failures
• Reduces risk of belt cracking or fraying under extreme temperatures
• Maintains consistent power delivery to engine components
• Improves overall engine reliability and performance

Installation Notes and Tips

When installing the Dayco 5070788 serpentine belt, ensure the belt routing matches the vehicle’s accessory drive diagram. Inspect pulleys and tensioners for wear or damage before installation. Proper tensioning is critical to avoid premature belt wear or noise. It is recommended to replace the belt tensioner and idler pulleys simultaneously for optimal system performance.

Quality Assurance and Standards Compliance

The Dayco 5070788 serpentine belt complies with SAE J1459 and SAE J2432 standards, ensuring it meets industry requirements for durability and performance. The EPDM and aramid reinforced construction provides resistance to heat and wear, supporting reliable operation within the specified temperature range of -45°C to 212°F. Dayco products are manufactured under strict quality control processes to deliver consistent and dependable performance.