I just started seeing coolant coming from something that is mounted on the left side of the engine. It sits between the coolant overflow and the water pump it has a hose going to it that forks off the water pump hose and then it has a hose coming off the back that goes to the firewall. It has an electrical connection also. What is this and why is it leaking. I am taking my first trip next weekend and I don't want any problems. Thanks in advance!

Chris Prestridge
1988 190E 2.3