D005297 gives me a $175 intermediate rate at DTW, $25 less than the Citi rate (A074800) and quite a lot less than some of the others (for example, D005927, which has been very good for me in Europe, comes up with $348!).

For those who are interested, I've used 5927 - the Bankruptcy Trustee rate - twice in the past year in Italy and Austria with no issue and very good pricing. There's no verification/ID required for general corporate rates. As always, YMMV - so I make "backup" reservations at another agency - but I've never been challenged, and I've used FT-posted codes 4 or 5 times without issue.