If this has been done before, please post a link.
These are the ones that often come up (in no particular order) :-
IMO - In My Opinion
IMHO - In My Humble Opinion, although there is divided opinion on whether the H stands for humble or honest...
ARB - anti-roll bar
DV - diverter valve
TBB - throttle body boot
DTS - drive train stabiliser
AFAIK - as far as I know
IIRC - if I remember correctly
WOT - wide open throttle
HTH - happy to help (well that's how I use it, but maybe also "hope this helps"?)
BMW - apparently another German car manufacturer
I'm sure we all know what LOL, PMSL, LMFAO, and WTF mean...
Please add to the list.
