80' 300sd Wont Crank Solenoid Click Only

[dcjasper]

Help! I'm new to benz and not mechanically inclined at all and I need to know exactly where the starter is located (a photo would be very helpful) and how I can attempt to jump it assuming my problem is not the starter itself. ie. Where exactly is the terminal block on my car, which terminal powers the starter, how to jump it... At least this way I can hone in on the problem. Already looked on passenger fender and found nothing that resembles terminal block. found one on driver side but no idea what it does.
Car started getting flakey a few weeks ago and now I either get a click from starter after holding key in start position for 30+ seconds. Checked/cleaned battery terminals already but not sure where to find the starter. Also read that old bosch starters have trouble starting when warm. PLEASE HELP!

dcjasper, OR

80' 300SD WONT CRANK SOLENOID CLICK ONLY