How to prevent gas leak in car aircon radiator?

I have a cracked aircon radiator in my Mercedes 200E Kompressor 2002. Wanted to top up the gas but told it would leak. Can it be sealed from leaking because it is made of aluminiun and cannot be welded?
C. King, July 2015


done
yes it can be welded they use argon welding

dannyboy, August 2015
http://mercparts.co.uk/s-mercedes_c_class-174032.html

X, July 2015
Get a new or replacement radiator

cdc, July 2015
link Click here to see other fixes for Mercedes.