I just replaced the thermostat on my 97 E320, and in doing the repair I cracked the thermostat housing cover.

I was about to order a replacement cover, but the ones for sale don't look like the one in my car.

The one in my car looks exactly like the one in this thread - http://www.peachparts.com/shopforum/tech-help/212906-pictorial-diy-thermostat-replacement-1996-e320.html . It has three bolts holding it down, and at the top there is a piece coming off at a right angle which connects to a hose going to the reservoir.

The replacement ones I see for sale have the three bolts, but they also have a threaded hole in the top which in no way could connect to the hose going to the reservoir, so these would not work as is.

After doing some googling, I get the feeling I need to order something called a bleed screw and a banjo fitting, but it's not clear which exact part or how to use it.

Ideally I'd like to replace it using the exact same cover, but if that's not available, I'd appreciate advice on how to use the one with the threaded hole.

TIA!