NSS is the old term for cars of today are calling the transmission range recogniton switch. The shift lock out module is part of the electronic selector module which is built in the selector which has a ignition lock control cable and selector level postion plug which communicates to the pcm.

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)