BTW, that clear plastic tube vent line is for any hydrogen gas given off by the battery. Hydrogen gas can apparently be given off by an overcharging battery or one that gets too hot. The tube MUST be installed correctly, or there is a fire/explosion hazard. MB has a recall campaign for 1998 C class (w202) cars because some came from the factory with the line improperly installed. Hydrogen gas built up on several cars, apparently, and there were fires. So check the tube position carefully and reinstall the same way.
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E