Hi again - ha ha - yeah you could be caught watching BMW porn!
OK Code 116
I am no expert but have had this too!
In fact I have historically had every code under the sun on the 4.8is suspension... I kind of understand it now... firstly with that code check for airbag leaks.. washing up liquid & water in plant sprayer...
If OK it is probably weak compressor... rebuild it with a new seal kit (bagpipingandy's kit on Ebay) ... search e-bay on item 151136257007 - about £25 when I did mine... will take you 30mins
My kit worked for over a year but then had same problem again because of scored cylinder head on compressor - he also has a kit for that... 1 hour fix & code has never re-appeared He even has a vid on you tube shows you how to do it all.
You will get there in the end.... honest! LOL
Best
Malc