It will depend on if your particular 1999 Mercedes-Benz E320 has hook-end arms or 1/4 side-lock where the pin goes through the wiper. See sources and related links below for installation videos for both.
Be sure you get the right replacement wiper blades. The 1999 Honda Accord takes 24" drivers side and 19" passenger side replacement windshield wiper blades. For installation, the replacement wiper blades will come with simple-to-follow, step-by-step, illustrated instructions
The 1999-2002 Honda Accord takes 24" driver side and 19" passenger side replacement windshield wiper blades on the front.
The 1999-2000 Jeep Grand Cherokee takes 21" replacement windshield wiper blades on both sides front and an 10" or 11" rear wiper blade.
The 1999 Mercedes-Benz C230 wiper blade sizes are 24" wiper blades on both sides front. See Sources and Related Links below for more information. Since there are over 22 different wiper arm attachments, do not buy wipers just by length only - be sure to lookup exact wiper blade part numbers by vehicle make, model and year for the brand wiper you decide to purchase. This ensures correct length AND correct attachment.
The 1999-2010 Chevy Silverado Series Pickup takes 22" replacement wiper blades on both sides front.
The 1999-2008 Ford F-Series Pickup takes 20" replacement wiper blades on both sides front.
It depends on if it has air conditioning or not
The 1999 Toyota Corolla takes 20" driver side and 18" passenger side wiper blades.
The driver side is a 24" wiper blade and the passenger side is a 18" wiper blade
For a 1999 Ford Taurus the driver side wiper blade is a size 24. The wiper blade on the passenger side is a size 20.
The 1999 Pontac Grand Prix takes 22" replacement windshield wiper blades on both sides front. For installation, the replacement wiper blades will come with simple-to-follow, step-by-step, illustrated instructions.
The 1999 Chevrolet Camaro has hook-end wiper arms and are easy to change. See the Sources and Related Links section below for videos on how to change wiper blades as well as what size wiper blades are on the vehicle (correct attachment and lengths). Tip: if you purchase the replacement blades first, there will also be additional instructions/illustrations on the replacement packages. Locate and press the tab or button where the wiper blade is inserted into the hook of the wiper arm and pull wiper blade out of hook. You may have to rotate and flex the blade to make enough clearance for the hook to pass through.