I have an 89 300 SEL that I have been troubleshooting. The car is running great and I am enjoying it. I am now focusing on the smaller but annoying issues. The dash rattles when I go over uneven pavement or cobblestones. I live on a cobblestone street!. I have been trying to lubricate the parts that come together, the plastic parts, that seem to be the source. I have been using a vinyl treatment not unlike Armorall.

Any suggestions?? It is worse when the ineterior is cold. When it sits in the sun, it is almost silent. Any suggestions would be appreciated. Thanks,

Herekee