funny noise at 65mph+
 

Hello all- today on my way to my football game, i was cruising down interstate 95...when i reached approximately 65 mph, a funny, and very noticeable, noise started from what sounded like behind the odometer (front driverside quarter of car)...it sounded like a very fast and unhealthy ticking noise, so i slowed down and pulled off into a weigh station. However, when i had decelerated to about 45 mph, the noise went away, so i continued on the highway. once again, when i reached about 65 mph it came back, so i again pulled off the highway. once again, it stopped when i reached about 45 mph, but for good this time. i drove cautiously to my game (about another 15 miles), consitently reaching 75+mph speeds on the highway, and no funny noises whatsoever. i also drove home today at such speeds with no such noises. any idea what this could be? thanks

p.s. it is a 1986 300E with 221k

ticking noise?
 

Is is possible it was/is a leaf or other object in the A/C-defroster duct flapping in the breeze? Also look carefully at the windshield moulding/trim.

Look for simple things first.

I've experienced a similar noise.
It would start at approx 20-30 mph and the 'ticking-interval' would increase with speed.

Turned out to be the errr.. don't know the english word for it! -'The small odometer you can set to zero by pushing a button'. It had gotten stuck somehow when i pushed the button at my last refuelling. I pushed the button a couple of times and i went away..

Freestyler