Whenever i hit the parkway or a road where i am doin around 75-80mph, the car is just not smooth at all. I can feel the road waaay to much. Is this the tires?? I have some wierd *** brand on there, Champiro HPZ or something. The car is a 2001 E430 4Matic with 30,000 miles.

how is the tread on your tires?
Look for visible tears. If none, get them balanced.

Tread is all good. It doesn't feel like a vibration from the tires, more of just really feelin the road, cause it doesnt seem to do it on the concrete highways that are super smooth. I think the rubber is too hard which is great for durabliltiy, but not for the ultimate ride.

what size are they? 19's?
Maybe you can take the tires back and trade them for another set.

No, the car is sitting on the factory rims. I don't know if the tires are factory or not.

I would certainly look at the tires first, particularly since they are an offbrand and most likely installed due to price. Even if they appear to be balanced, one or more could have a bad belt. I assume you purchased the car used and that you did not purchase the tires

that's just the way the car is, my mom has an '00 E320 stock w/ Michelin Energy MXV4 Plus on it, and the highway ride is very "jiggly", you do feel everything.....I dont think MB did a very good job on the W210 standard suspension

Did you check pressure? Sometime if it's overinflated then a ride's a bit rough. However if you have a speed dependency, then it's more likely balance problem.

A year back I felt slight vibration at freeway speeds. Balance check showed clear and tires remounted. Felt them again - back to to garage. Rebalanced, though no obvious variances detected. After a month, seemed to resurface only at freeway speeds...and only when warm. Tires rotated, keeping careful track of which was which. Long story short, belts on two front tires suffered failure to where bulging disk anomaly resulted...along the circumference of the tire. Looked like Alien coming out of the guy's stomach.

Hah I've seen that before. It makes a nasty vibration at highway speeds. I've been curious about whether it was a manufacturing defect or if it was just one of those super sharp curbs a driver might hit every now and then.