I need to replace the wiper on my '97 E420. I have previously bought the inserts at my dealer, but they don't seem to work very well. Are there any options? Can the whole blade be replaced or only the inserts? Thanks.

 

Buy 24" Bosch replacement wiper arms from auto part shops.
The OE is 25" and only covers a little more at the very bottom (the area you have no reason to care).

 

For what years is this good? I need a new wiper too! Does Bosch not make a 25" arm ?

 

All years. The 25" is specifically made for the w210 and only available at the dealer. Go with 24", you won't have reasons to mind.