I want to send my speedometer out for odometer repair and calibration. I'm using my 190D as a daily driver and am wondering if I could cause any damage to the cable or sender if I drive with the cable disconnected.

Another question, does the speedometer come out of the cluster OK or do I need to send the entire cluster out?

I know this is probably a DIY job but given my past experience in odometer repair I'd rather just pay a professional to do it right the first time.