I only tried with car idling still. If I turn the steering it doesn't make noise. But if I use automatic parking for example it makes noise (parking at low velocity) . Is there some kind of pump inside the steering column that could make noise?
Anyway I'll have to make more experiments to clarify the situation. It's not easy
The serpentine belt on a typical Mercedes car can drive as many as eight pulleys. Alternator, Water Pump, Crank Shaft, Power Steering Pump, AC Compressor, Kompressor, Idler Pulley Wheel and Tensioner Pulley Wheel. At best finding which Pulley (which Bearing) is creating noise is no easy task...
It is conceivable that an electric/electronic power steering can be noisy in only one direction, have you tried putting the front of the car onto axle stands and turning the steering without the engine running (assuming that's possible with just the ignition on)?
I don't think an electric/electronic steering should be bothered by full lock, but there is an electric motor inside.
Thank you. Not tried yet, on that car this requires removing the undercover panels etc. I think I'll ask to a mechanic, hoping at the dealer they recognize the noise instantly. I'll keep the topic posted
Welwyn Merx Limited is a family run business with genuine passion, dedication and 25 years of experience dealing with Mercedes-Benz and AMG passenger cars. Tel: 01707 395999www.welwynmerx.uk
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