What are they called?
What do they do?
How can you tell if they are bad?
What kind of symptoms would happen if they are bad?

Thanks in advance.

Attached Thumbnails

     

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1993 Benz-190E-2.6 liter

Looks like the subframe mount bolt. If the subframe mounts are bad you will have a lot of rumbling and popping sounds from the front end.

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

These are parts in my cars rear end. Would the sound still come from the front?

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1993 Benz-190E-2.6 liter

Try and be more vague...I'm practicing my mind reading skills....
what year car are we talking?
They look like bushings and look like they are worn out!
Your pics show the springs right next to them.....frame bushings?

Sounds like rear frame bushings.

a presentation of pictures upright would help

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Keep us posted especially if your problem is solved
Present cars:
My car: E-class 420CDI, 2008, W211, V8, 180 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km

Son's one: GLK class 220CDI, 2009, W204

Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original).

E-class, W210 320CDI, 2000[/B], 225 000km, Sold