if u dont manage to fix your temperature display , contact forum member jamesdean he fixes them. checkout the following thread for more info:Outdoor Temp Display Repair


replacing all the fluids and filters sounds like a good idea. the only thing i would add, is to have your ball joints inspected by a reputable MB indy shop, or just replace them if you want peace of mind, cause when a ball joint breaks the car can no longer be driven, even getting it up on a flat-bed is a real pain. example, see post#2: Ball joint failure on W124

hope you enjoy your new benz