First, thanks for the referral to the speedo shop - I emailed them for a quote to recalibrate but haven't heard back yet.
Now that I have the 560SL speedo, I need to know what gets connected to it (then I'll figure out if my '72 SL has all those things!). This is what the backside looks like:
For those who didn't remember from earlier in the thread, I'm putting a 560SEL engine/trans in my SL, so I have to use a speedo that uses the same type of sender the (newer)transmission has.
M D Nugent