equitiesguy

I'm looking for information on the temperature of the thermostat on the M279 (or the M275) engine. Looking to pick up a 2018 S65 Coupe, and am troubled by only a three gallon radiator system in what appears to be a poorly designed cooling system, given the heat generated into the circuit by both the turbos and the transmission.

What's your normal operating temperatures run at?

haa

I have a 2019 S65 Cabriolet with 3500 miles driven so far. Engine Temp is usually 208 Deg F when driving in comfort mode. Oscillates between 214 deg F and 210 deg F when in stop and go traffic in sport + mode. Never seen it exceed 214 deg F.

equitiesguy

Appreciate the feedback.

SpiderAce

My s63 is rock solid at 200 F. Little variation. Only rising slightly in the middle of the Texas summer.

equitiesguy

Sadly, I just drove an S65 coupe today (2017) and wasn't impressed across the board. Will be sticking Italian for a while.

haa

There was a major update in 2018. Try a 2018 or newer

Rick Cell

My 2016 S65 stays at 200F and I have never noticed it exceeding that. It is an amazing car. I wish it had a little more rumble out the back when the engine is warmed up. My previously owned 2008 CL65 had a touch more rumble out the back when the engine was at operating temperature.