Mercedes-Benz bulletin LI46.35-P-077911

Complaint Partly reduced power steering assist when stationary or at low speeds, at approximately 7 MPH, such as when parking. No warning message is displayed and no fault codes are stored. Steering assist returns to normal after key cycle or at speeds greater than 7 MPH but condition may return until remedy is performed. Cause Software in the electric power steering (ES) N68. Remedy Perform software update of electric power steering (ES) N68. Disclaimer NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.

Owners of the 3 model years this bulletin names have filed 132 complaints with NHTSA since 2015. 103 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.