From some weeks now, I was noticing a creaking noise (like an old mattress makes) when turning wheels getting out of my driveway or when the Van was stationary. Took it to the mechanic today and he sprayed some grease/lubricant stuff on the strut boots and this fixed the noise. I was really worried that this might be some serious issue with either the struts (strut bearings) or dry ball joint. However, a simple greasing of the plastic boots that cover the struts solved the issue.
So, I thought I let everyone here know, if someone else is having similar issue to try this simple fix first.