Here's my 10 dollar thought.
PLEASE!! Change those flex discs at 10 years without fail!
They are easy to change and can be purchased at other places than the dealership. The dealer price is $130. And only $2 for each (set of two) rubber bushings for the shift linkage.
On a 1991 300SL it was told to me that the airbag activation mechanism is directly linked to the drive shaft!! If the flex disc fails completely it can deploy the VERY expensive air bags. This 'disc' is composed with rubber therefor it is strongly advisable that you take a look at the strut mounts as well. Here's the deal; All the rubber components only last so long before they 'dry-up' or otherwise decompose. The thottle linkage on this car has a rubber bushing that holds the very end of the thottle cable to the 'carburator' (if you will) and costs about $3. It takes less than 10 minutes to install the new (plastic) one. Throttle linkage... cable pulled thru in an intersection and there I was stuck in idle and needed to wire this thing together to limp home. Ordered the part via UPS next day air and installed it. A $3 part puts an $80,000 machine out of comission.
Again I'd like to mention... Check ALL of the rubber components at this time. It will save you a fortune! The damage that can be done might well constitute total loss of the car, whereas the cost of all of the rubber parts are only around one thousand dollars.
$6 for the rubber grommett for the antennia and the trunk was all wet, yup! CD changer is right there.

YES, the flex disc gave out in my car. It broke, while spinning around it ripped the oxygen sensor cable out, vibrated, banged, and stalled the car. Towing, loss of work time, the cost of resetting the codes, etc. And even at this it's clear that I'm LUCKY!!
......An ounce of prevention (PM) is worth a pound of green paper