You could do that, or you could text her once you're there and wait beside your car? It depends on whether she usually gets your texts quickly ... you could also let her know when you're on your way and let her know you plan to text once you're there? That way she knows what to expect, and she has an opportunity to voice her preferences.
But also these are small potatoes, maybe you're just overthinking it because you're anxious and don't want to "screw up"?