SLK/R170: Going broke
That sounds like pretty normal repairs for that car. The drag links wear out over time, the steering shocks leak over time and the trans conduit (electrical connector) leaks over time. The steering shock and trans conduit would take maybe an hour if you don't have access to a lift and are doing it out in your garage. However the drag link assembly would be something that I wouldn't recommend for the amateur car mechanic because I would also recommend an alignment after replacing it.
As for your question about them being a "must get done now" repair, I'd have to say no. You may experience some tire wear issues unless you have just gotten a recent alignment performed, but the rest is just leaks and I wouldn't say it would need to be done unless you feel the transmission shifting strange (possibly low on fluid) or the steering becoming real jerky over bumpy roads. The car would drive alot better once these things were replaced though.



