Purpose and Specifications

FEBI BILSTEIN 21647 is a premium hydraulic fluid designed specifically for power steering and ABC (Active Body Control) suspension systems in Mercedes-Benz vehicles. This fully synthetic green fluid meets Mercedes-Benz specification MB 345.0, MB 345.1, and DTFR 31B120 standards.

Key Performance Features:

• Low compressibility ensures responsive steering feel and precise control
• High corrosion protection prevents internal component wear and extends system life
• Excellent lubricating properties reduce friction in pumps and cylinders
• Superior aging resistance maintains performance across temperature extremes
• Prevents foam and deposit buildup that can damage seals and valves

When to Use / Replace?

Replace FEBI BILSTEIN 21647 hydraulic fluid every 2 years or 40,000 km, whichever comes first. More frequent replacement (annually or 20,000 km) is recommended if your vehicle operates in extreme conditions, towing heavy loads, or frequent stop-and-go city driving.

This fluid operates effectively between -30°C and +100°C, making it suitable for year-round use in most climates. Check your power steering reservoir annually and top up as needed—low fluid levels cause steering stiffness and pump damage.

Compatible Vehicles: Mercedes-Benz S-Class, SL-Class, SLK-Class, SLS AMG, and other models equipped with power steering or ABC suspension systems from 2002 onwards.

Frequently Asked Questions

Q: Can I mix this fluid with other power steering fluids?
A: No. Always use the same fluid type specified in your owner's manual. Mixing different fluids can reduce performance and damage seals. If switching brands, flush the system completely first.

Q: How do I know if my power steering fluid needs replacement?
A: Dark brown or black fluid (instead of green), a burnt smell, or stiff steering are warning signs. Inspect the fluid color in the reservoir—it should remain bright green. If discolored, replace immediately.

Q: Is this fluid safe to handle?
A: Wear gloves and avoid skin contact. If swallowed, seek immediate medical attention. Use only in well-ventilated areas and dispose of used fluid at an authorized recycling facility—never pour down drains.