Maybe it's a different configuration on the 126, but my 124 with M103 has a vacuum line from the intake manifold to the EZL, and a plastic tube from the purge valve to the throttle body for recycling fuel vapors.

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1988 California version 260E (W124)
Anthracite Grey/Palomino
Owned since new and still going strong and smooth
MBCA member

Past Mercedes-Benz:
1986 190E Baby Benz
1967 230 Inherited from mom when she downsized
1959 220S Introduced me to the joys of keepin' 'em goin'

There are only 10 kinds of people in the world--those who understand binary and those who don't