I discovered one of these hidden options when I ordered my car last year: a BMW 228i with both the M Sport Package (ZMM) and the Track Handling Package (ZTR). As a result, it came with an extra radiator -- a happy surprise, since it means I can take longer stints on a race track in the 100-degree Texas summer without overheating my car.
This got me thinking -- how many other cool option combos are out there? The answer is tricky, since, well, these are some of the best-kept secrets in the industry. But there are a few well-known examples of brilliant hidden options from the past few decades that resulted in some truly unique, badass cars.