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the caps pop off (snap) there should be a little area on the edge where the volvo lug wrech will fit in like a srew driver. the lug wrench is rubber coated on that end so it will not scratch the rims.
1.the bolts that hold the rotors on are the lug bolts and should be tourqued to reduce the risk of warping the rotors. Tire shops just Air wrench them on as tight as they can-this can be bad.
I believe the tourque settting is in the owners manual.
2. interferance in the radio is caused by electrical interferance, either a short in the wires with the brake lights and speakers. the engine noise is ussually from non supressive ignition wires. are the spark plug wires on your car stock or cheap aftermarket?
3. buzzing noise could be the turn signal relay/timer thing.
all just my opinion of course.
hope it helps
Dan
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