2007 Mercedes Benz S550 4Matic 8 Cyl 5.5L - Steering & Suspension
2007 S550 Steering gets stiff after 10 MPH
After reaching 10 MPH I got multiple alarms - ABS, Park Assist, Distronic cruise control, night vision - and at the same time the steering got stiff. The steering is fine below 10 MPH even after getting alarms. The dealer found codes 5964, 5945, 5962, 5944, 5906, and 5905 replaced Traction control Hydropneumatic unit. No more alarms but the steering still gets stiff after 10 MPH.