2002 Audi TT won't go into reverse

I have just under 80K miles on my TT, with standard 5-speed transmission. Last week it started to get difficult to put the gear shifter into reverse. The next day it wouldn’t find the reverse gear at all. All other speeds are fine. I’m hoping it is related to the cable linkage, and not the transmission. Has anyone had a similar experience?

Will the transmission go into reverse with the engine off? If it does it’s probably a clutch issue. Check the clutch fluid level. Post back after you find out if it will shift to reverse with the engine off.