Hope your eye lid got better.

U need a small light bulb, hold one wire to ground another wire to the glow plug terminal , see if any light comes on, or use a voltmeter.

Not sure on these 190, on the old 300SD we have a primer pump whcih u need to pump until all the air bubble comes out. Air trapped inside will not let the diesel goes thru.

Usually u won't have the batt terminal reversed, don't think it can even turn the starter crank, only one direction.