S210 parameter steering problem.
 

Some time ago I bought a 2001 S210 E280 avantgarde 4-matic.
The steering was very light, at low and high speed.

Last week I read the codes, it said that the control unit was defect.
Reset the fault memory and the error did not show up again.

Now the steering is firm at high speed but not very light at low speed, it is ok but not as light as it was.

In DAS the current trough the valve is 860 ma, in DAS 400ma is low and 800ma is high..
The resistance of the valve coil is 850Ω measured at the control connector (should be between 300 and 800).
I have not yet measured at the coil itself.

Any idea how I can make the steering lighter at low speeds?

Rob