Glow plug control Relay.
 

Hi, could anyone please tell me where the glow plug control Relay is on my 07 c30 2.0d is please. I assume it's in a really hard to get to place because I can't seem to find it anywhere.Thanks Micky.

Glow time relays are installed in various locations in the vehicle. Plug-in relays are primarily located in the central relay box. Relays which have screw-on cable shoes for the supply line to the glow plugs instead of plug-in contacts are located in the engine compartment. Let me know if this helps, dede, pressure washing owner