Had a Hella fitted by my mechanic as standard and no plug, all sealed. Incredibly quick and efficient, would recommend.

 

http://autoairconditioningltd.co.uk/

People here are being told by mechanics that this white plug on the condenser is hard to remove, but has someone actually managed to get it off in the end?  My 2006 Octavia is leaking from there (confirmed), and would be so much easier to replace just the plug and the air dryer element than replacing the entire condenser.  A new plug and dryer element is available for around 15 Euros, but, as noted, the old plug is hard to remove. I have tried it (14mm hex key), but applying torque moves the whole condenser/radiator assembly, and I am afraid adding torque would break something and then you'd end up with replacing even more parts.  So if someone has managed to get the white plug off, please share your tips. (Tried WD40 with no results.)