Thanks guys. I'm going to have the tires rotatated and balanced again. I think it has been over 7500 miles since the last time I had this done. I don't plan on driving that fast again but was wondering if something in the suspension that looks and feels ok could cause the vibration. Both flex discs are newer and in good shape, and front is the correct flex disc as well as the back. I will deflate the tires to the recommended 27/27 psi that the fuel door shows. Wow! I never knew that label was there. I'm glad I asked! I filled the tires with air after driving and in hot weather conditions but could not find the inflation recommendation anywhere before. These babies are probably way too tight!!! Duhhh! The suspension is nice and stiff and turns are very tight with little to no play in the steering wheel.

Please do yourself (and everybody else you put at risk) a huge favor and learn about tires.

You don't know when your last rotation/balance was, you don't know how to check your tire pressure, you don't know what your tire pressure should be, you don't know the speed rating of your tires, you consider them "new" at 40k miles, and you're taking the car to a claimed 130 mph.

Way too many damned important "details" being ignored in this scenario.

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1961 220b: first project car - sold.
2000 CLK 430: first modern Benz - sold.
2001 CLK 55: OMG the torque!!! - sold
1972 280SE 4.5: Baby Gustav
1991 300TE 4Matic: Gretel the Snow Bunny - sold
1978 300SD: Katz the Free Man - given away
1980 Redhead: Darling Wife

Ramonajim...Wow! That was pretty harsh. I hope you feel good about that lashing you just gave me. If you knew me you wouldn't have done that. Most of these guys are very helpful in this forum. Maybe I'm an idiot here on this one but at least I'm trying to find out and do the right thing. If you read my first thread correctly, I said I was on a safe track and that the tires were new and now have 40K on them. Have a great day. You seem like a sharp, wonderful individual yourself

sptt, tire inflation pressure information is also on the driver's door jamb and in the Owner's Manual. You can regularly run your tires at up to 34psi without any problems ... 27psi gives a very cushy ride.

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Fred Hoelzle

Thanks Ferdman! I don't have anything in my door jambs as that is where I first looked and it did not come with an owner's manual. It does have the sticker in the gas tank door but I just learned that today. Cushy ride is what I am after! I already deflated to 27psi and am going to get the rotation and balance done. You cannot see any visible wear on the tires...they look so even compared to my son's new Nissan Truck and my wife's Altima SER (those tires go way too fast!).