Hi all, I have a question with regard to my W123 300TDT (1984).



Recently, on two occasions I tried to start the engine, but the starter motor just spun fast without turning the engine over at all. Both times, I turned the ignition off, let the glow plugs fire again, and then started the car as normal.


I gather this is a faulty solenoid(?)



I have a spare starter motor, but I'm curious if it's possible to just replace the solenoid rather than the entire starter. (I have read that the starter motor is a bit of a bear to remove, so if a partial replacement is an option than I will consider it.)


Thanks in advance for any info you can provide. I couldn't own a Benz without this forum!