95 S420, I have a slight center "slack feeling" that the dealer doesn't seem to be able to find. There is occasionally a small pop sound while turning. I notice it at slow speed while turning over uneven surfaces. Starmarked warr.'ed car. But they haven,t found it. I don't want to wait for it to get really bad before they repair it. ? Does this vehicle need the steering box bolts torqued frequently like the 300E 87 I had earlier?