Review on High-Quality Fuel Pump Sending Unit Replacement with Filter for Mercedes Benz W219 W211 S211 E280 E320 E350 E500 CLS500 by John Clark

says to use the old sensor. it will not work. even if you take the cover and sensor off your old filter block. because there is no opening for spores/fuel to enter the seal chamber. You will constantly throw fuel tank pressure codes. Unfortunately I can't go back because I didn't have time to install and explore the old one until I'm back by date. 06 cls 500, V8 engine 5L m113. Just spend a few dollars more and get the sensor already in place.