This bulletin applies to Mercedes-Benz vehicles equipped with electric steering, such as 2017 CLS400 vehicles. A rattling/humming noise may be heard from the electric steering system.
The ball screw drive of electric steering may be damaged by external forces such as hitting the curb with the front wheels, driving over obstacles (bumps, potholes, etc.) at an inappropriate speed, and/or corrosion ingress through a damaged rack boot, any of which can require replacement of the steering gear.
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
