No egr indeed. And double vanos was only introduced on the N62 engine. M62TU only has intake vanos.The E39, AFAIK, does not have an EGR valve. It uses valve timing to effect EGR control.
Fwiw; my e70 cuts out cruise control when some dsc issue arises. Discrepancy in wheel speed at some corner. It does not require much, im not talking donuts in the parking lot or so. So chasing down the whole dsc system makes somewhat sense to me.
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