The glow plug control unit J179 is located in the E-box under the battery
The automatic glow period control unit - J179- is installed in the electronics box in the engine compartment.
♦ The assigned position in the relay carrier depends on the equipment ⇒ Current flow diagrams, Electrical fault finding and Fitting locations.
– Remove battery tray ⇒ Electrical system; Rep. gr. 27 ; Battery; Removing and installing battery tray .
– Remove electronics box cover ⇒ Electrical system; Rep. gr. 97 ; Relay carrier, fuse carrier, electronics boxes; Removing and installing electronics box .
– Pull off automatic glow period control unit - J179- from slot in electronics box in engine compartment ⇒ Current flow dia‐ grams, Electrical fault finding and Fitting locations