I'm a huge fan of DIS 57 but I'm not sure if it works on the E70. DIS can read and actuate pretty much everything and run diagnostic routines, come up with repair plans, TIS bulletins and wiring diagrams and AFAIK ISTA is supposed to be the equivalent but maybe not ??

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)