It's super-easy. When coming from Efrat, take Derech Hevron, and turn right at Asher Viner St. (the first big right AFTER Har Homa). Make the first right up towards Ramat Rachel/Arnona, and then right again, towards Arnona, at the traffic circle. Cross over the bridge, and then turn right again onto Kfar Etzion St. (just before Midreshet Lindenbaum) and drive down most of the way, past Mozes St. There's parking on the street. On the right side of the street, go through the gate that's marked "For Guests of the Diplomat Hotel" (or something like that). There's a long ramp and the consulate is at the bottom.