Real coolant temp of ML 63 AMG W164 (M156)
Тhe temperature displayed on instrumental cluster is not real. M156 thermostat open at 100 C / 212 F. Temp on cluster ~ 90 C / 194 F is below real.
Mine coolant hit 108 C / 226 F at stop and go traffic (checked with OBD) on cluster is around 90 C / 194 F. At highway is around 94 C / 202 F - on cluster is 90 C / 194 F.
Max oil temp ever seen (stop and go traffic) is 117 C / 243 F with 5W40 - Castrol / Mobil / MB (oil temp is same with different oils).
On highway my oil temp is 103 - 107 C / 217 - 224 F.


