300SD (126.120) L5-3.0L DSL Turbo (617.951) (1982)
Pencil element glow plug cylinder 4-2.5 black/yellow
Jack 5 of coupler =
Pencil element glow plug cylinder 5-2.5 black/green
Pencil element glow plug cylinder 4-2.5 black/yellow
Jack 5 of coupler =
Pencil element glow plug cylinder 5-2.5 black/green