glow plug relay
 

I have the 1974 240D. I replaced the the glow plugs today. Pulled to start light came up in the dash, motor did not fire, my new problem starts here, the bus wires stayed hot after I let go of the knob. I am assuming that this is a relay timer issue. Is it under the dash on the left grouped in with three other relays? What are they, do they have anyting to do with the glow plugs. Also to bypass the pull start how would I get the plugs hot? thanks

http://mercedesshop. says theres no relay if theres a gorilla knob whats the deal 1974 240D 115 616What is bolted along side of the column 3