As you can already see in the headline is my heat exchanger in the eimer. Where I wanted to get in this morning I slipped out on my floor mat. Now I have the problem, how do I get the thing removed without it running out and how do I get the new one back in without it licking afterwards. Do I have to notice what specific ? Of which models does the heat exchanger fit WITHOUT climate still at the 850s ? Would be over a few answers e.g. an instruction on ENGLISH Very pleased.