Investigation PE03006: 1999–2001 Mercedes-Benz ML320

Status

CLOSED

Opened

Feb 13, 2003

Closed

Apr 4, 2003

Model years

1999–2001

Subject

Power steering hose assembly leakage

Component: Steering › Hydraulic power assist › Hose, piping, and connections

Summary

The hose clamp used to secure the power steering fluid cooling hose to the steering fluid cooler may not provide sufficient clamping force for the connection.the loss of power steering fluid may result in gradual reduction in power steering assist (I.e., increased steering effort) over time, with potential damage to the power steering pump. There have also been a few incidents of hose separation from the fitting, that have resulted in more rapid reductions of power steering.testing conducted by mercedes-benz indicates that the leaked fluid is not likely to be exposed to hot engine components.there are no known allegations that the defect condition has caused a vehicle fire. Mercedes-benz will conduct a voluntary recall campaign for the subject m-class vehicles.mercedes-benz will install a new hose clamp on the power steering hose to the power steering cooler of the subject vehicles.during clamp replacement, the power steering cooling hose will be inspected and replaced as necessary.

An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.

Model years covered

• 2001 Mercedes-Benz ML320136 complaints
• 2000 Mercedes-Benz ML320166 complaints
• 1999 Mercedes-Benz ML320125 complaints