A wire that is getting hot could be shorted to ground.
on the firewall behind the battery.
Flat battery, neutral safety switch, starter realy poor battery connections.
Could be a bad starter solenoidCould be a bad neutral or clutch safety switch if so equipped
The 1978 Mercedes-Benz 450 starter relay switch can be found on the firewall in the engine compartment. The starter relay switch will be on the drivers side of the firewall.
Dead battery? Loose or dirty battery cables? Bad starter solenoid? Bad starter? Neutral switch?
Low battery? starter? starter solenoid? Battery cable loose or dirty? Seized engine? Neutral switch?
Start by cleaning the battery cables. Dead battery. Dirty/loose battery connections. Not fully in park or neutral. Blown fuse. Bad neutral safety switch. Bad starter. Bad starter relay. Bad starter solenoid.
Could be,Battery failure, Loose or corroded battery connections, Starter relay failure, Starter failure, Starter solenoid failure, Neutral safety switch broken or out of adjustment,
Could be,Battery failure, Loose or corroded battery connections, Starter relay failure, Starter failure, Starter solenoid failure, Neutral safety switch broken or out of adjustment,
Weak battery? Loose or corroded battery cables? Starter solenoid? Starter? Neutral Switch?
Dead battery? Loose or corroded battery cables? Bad starter? Bad starter solenoid? Bad neutral Switch?
Seized engine Discharged battery Loose or corroded battery cables Starter or starter solenoid Neutral safety switch