Performance by cohort
2 year bands · 6,478 tests
Pass rate is broadly flat across the cohorts — new and old E 220 Amg Lne Ngt ED Prm + D A examples track each other at the test bay.
Pass
87.9%
Fail
10.5%
PRS
0.9%
Avg mileage at test
46,066 mi
Pass
87.1%
Fail
11.0%
PRS
1.0%
Avg mileage at test
34,812 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.