Yes, I have the same thing on my C280. It does not swing up and down as freely as other dual wiper setups do. So far, mine hasn't broken yet and I hope it doesn't break in the future. Although, it might be imagination but it does seem that it has gotten harder to snap up and down as it has gotten older.

__________________
Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record