I recently acquired a 3 year old Merc and the wheel bolts are rusty as hell. Apparently it's a known problem on Mercs. Anyway I'm looking to replace them (suggestions welcome) and naturally, sets that include locking wheel nuts are more expensive. They are also ugly. It set me thinking - are locking wheel nuts really necessary these days? I don't think I have seen a car on bricks for 20 years.