Coolant Expansion Tank Jaguar S-Type XF XJ 2.7 & 3.0 V6 Diesel - C2D36878. Coolant Expansion Tank Jaguar S-Type XF XJ 2.7 & 3.0 V6 Diesel- C2D36878. C2C39440, C2Z4255, C2Z11668, XR837575, C2D36878. The Coolant Expansion Tank or Reservoir in your Jaguar allows for monitoring and adjusting the coolant levels in your Jaguar.
