Ive mentioned this in a previous post, but rattling does NOT indicate by itself a problem. There is a piece of phenolic insulation between the bottom of the PCB in the unit and the metal case of the relay that is not glued in; it rattles.

__________________
86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

http://juliepalooza.8m.com/sl/mercedes.htm