I am assuming that "inserts" mean "refills" (only the rubber blade, not the blade and frame which is commonly called "wiper blade"). I will recommend however, that you consider replacing the entire wiper blade - especially in colder climate with ice and snow - because the frame does go through a lot of use and abuse and for small difference in price, you're best off replacing the entire wiper blade.
That said, whether you replace the inserts with refills or you replace the entire blade, the 2005 Mercedes-Benz E320 has 26" front wipers.
Note, be sure to always look up your vehicle make, model and year in the application guide book at the store, or now-a-days you can Google 'lookup wiper size'.
How do I replace the windshield wiper switch?
Replace the locking tab on top of the wiper
How do you replace the wiper blades on a 2006 Mercedes C230 Sport
2001saturn l200 how to replace a windshield wiper switch
Its going to vary by the year of the Mercedes-Benz E320. See sources and related links below, lookup the wiper blades and then use those part numbers to lookup the installation videos.
? wiper switch toyota camry 1999 replace
To fix windshield wipers on a Volvo 940 try using new wiper fluid and cleaning the windshield and wiper blades before you replace the blades. It is also important to replace wiper blades regularly.
How to replace wiper motor on a 1998 montero sport mitsubishi
a bad fuse, control module (that little thing you use to turn on your wipers), or the windshield wiper motor is bad.
yes
No
The windshield wiper arm is held in place by a retaining clip. Hold the retaining clip in and the windshield wiper arm will come off. Put the new windshield wiper on and read lease the retaining clip.