C128 300 power steering very stiff no indication on the panel!

Question

Good day,

On Mercedes Benz CLS550 (w218)

The power steering is very stiff and an indication or alarms on the dashboard panel!

By diagnosis the fault show this code c128300 & description (the signal value of the steering angle sensor in electric power steering are impulsiable relative to each other...)

Answer 1

Make sure ur pump is working on the high pressure line to the rack and that theres no leaks and the rack boots arent damaged covering the tie rodthen check steering column link after straighten wheels and reset steering angle sensor using scan tool check all fuses and should work on electric steering always check for current and resistance then repeat steering angle reset if need to replace them remove the steering wheel and panels then drop the column to access the sensors