My P5 is at home where she belongs after being in my driveway for a while. She's driving fine but still has that low idle going on. The shifter linkage shakes a lot! I mean when I have the gas pedal down nothing but as soon as I let up it shoots upwards. I tried tightening the bolt and nut with no luck as that rubber piece just above the shielding for the exhaust system is already getting worn out. Next set of business is I believe trailing arms or I've seen them called suspension links. What do these do and with a car this old would it be a good idea to upgrade or stay with stock form? i also read they were labeled as rear rearward and rear frontward which make sense but again, what benefits will I get with this?