Hello together, after I was helped so well here the last time, I have the next questions again I have to exchange the water cooker, because the old is already slightly leaking. Are there perhaps any special features/problems to expect – or is this jerky done? Then I will exchange the evaporator because the AC is leaking. I found a description and as a “problem” only turned out the type of the climate oil. I can of course at the best n Will not realize from which manufacturer the AC compressor is. I ask myself therefore, must the OEL PAG100 or PAG 46 come in – does this really matter so much? Thank you already for your hints! Greet Frank