300SD (140.134) L6-3.5L DSL Turbo (603.971) (1993)
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EGR Wide Open Throttle Valve: Description and Operation
EGR Switchover valve (Y27), A/C Compressor Cut-Out/EGR Microswitch (S27/6)
The EGR switchover valve (Y27) is activated by the control linkage microswitch (S27/6) 10° before full load, thereby closing the EGR valve.
