BenzWorld Junior Member
Date registered: May 2005
Vehicle: C280, C230, 91300SE
Location: Austin, Texas
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RE: sounds like snow tires on the front...
The differential tends to be a bit noisy in these cars, so it could be that. A noisy rear end tends to support the continuing noise when the car is out of gear and coasting. The high revs at highway speeds tend to exacerbate the problem.
My 91' 300SE is also a bit noisy under the same conditions. I don't have a "good" one to compare it to, so I'm assuming some of my noise is normal, but it is still irritating and needs to be rectified. Drowning it out with the radio works, but I still know it is there. Other than this noise, the car is as quiet as any new car on the road.
My plan of attack is to check the body mounts, change the gear oil in the rear, and check the wheel bearings. I need new shocks all around too. I'm betting the combination of these efforts tone things down.
If your car has over 100,000 miles, and you don't know the service history, you should attack the wheel bearings first. They are a relatively easy, inexpensive fix, but not after they chew up the axle and bearing housing and leave you along side the highway.