Trying to install water temp and oil pressure gauges in my Smart.
Water - The coolant drain plug is M12 X 1.25 (can someone confirm this, please)
Adapter to 1/8 npt is here -
LMA Gauge Sender Unit Adaptors | Demon Tweeks
Oil - The oil pressure port is 1/8 bspt,
adapter to 1/8 bspt to...
Been trying to install an oil pressure gauge in my Smart for a while, got one in my other car.
Space is really limited, and you are near the flat belt, too...
A 4 port cube, with M/F 1/8 BSPT and FOUR 1/8 NPT, with three 1/8 NPT plugs included...