BlackBoost wide open thermostats help Mercedes-AMG engines run cooler under hard driving in hot climates. Choose your model and engine below, including the M156, M157, M177 and M178.
Wide open thermostats for Mercedes-AMG
Frequently asked questions
What does a wide open thermostat do?
It keeps the coolant circuit to the radiator fully open, so the engine is cooled at maximum capacity at all times instead of waiting for the factory thermostat to open at around 100°C.
Which thermostat fits my AMG?
Choose by engine code: M177 (C63, E63, GLC63, GT63, G63), M176 (G500, G550, S560), M157 and M278 (E63, CLS63, S63, S550), M156 (C63, E63, CLS63, SL63, ML63) or M178 (AMG GT).
Is a wide open thermostat suitable for daily driving?
It is designed for racing applications. It suits hot climates like the UAE and GCC but is not recommended in very cold weather.
Do I need a tune for a wide open thermostat?
No tune is needed. We recommend having it installed by an experienced mechanic.
Do you ship thermostats worldwide?
We ship worldwide from our UAE headquarters in Ajman by DHL or FedEx, with a signature on delivery. In-stock orders are usually dispatched within 24 hours, and made-to-order items can take 4 to 8 weeks. Customers in the USA, Europe and Australia can order through our official USA, EU and Australia stores.