Mate
Just replaced bothbanks, the LH bank is a snack, the RH a little more difficult however only involves removal of the air filter connection horn and hose. You will need a set of metric Allen Keys and the suggestion is that you replace the O ring seals during the process. All OEM items realistically priced at Autohaus.
If the replacements are the result of fault codes you may have to clear these using an OBD 2 device as my vehicle did not erase the fault codes automatically.
Gravy