vibration noise not wheel balance

[Thai GI]

1. I have a vibration noise on the left front only between 45-55 MPH, it sounds like that rattle when you turn the speakers up hudd hudd huddddd hudd hudd…

2. It’s not engine/RPM related because it does it on “N” coasting at the same speed.

3. It’s not wheel balance because if I switch the wheel and it’s still there.

4. I’ve looked under there and everything seems to be ok and tight.

5. Also took the finder off to see the air canister and vacuum bottle, both are secured.

6. Any ideas what else is going on? I wish I have something to check it at 45-55 MPH.



Car specs: 1988 260E California
Modifications to that area:
Intrax springs with 2 nibs rubber pads
Wheels: 17 X 7.5 from CL500 tires 225X45X17 (yes it’s tight but fit and operational)
ABS is disconnected in this car



Thai GI sends