Ah, so you have an MK4.

Currently my MK3 is running 1/63 and that's when I lost all the details of my local roads.

Since then, I've modified my wiring harness so that whenever I travel onto a road that my "new improved" MK3 can't handle, I can pop in my MK1 and it guides me without a second thought.

Funny how the old stuff "just works"