The "pencil-type" glowplugs won't work with your preglow system.
Electrical scheme for "wire-type" glow plugs (as on your L 407 D) is below.
It needs to install relay for "pencil-type" glowplugs from w123/201/124 or retrofit "fast-preglow" kit (p/n BOSCH 0 250 201 955).
Last edited by Dr. Sternschnuppe; 03-24-2016 at 01:44 PM.
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