Q&A

there is a very small oil cooler on my 300M and a small leak has formed on the lower left side connector. What type of connector was used, and how do I tighten the fitting? The part I am referring to is located immediately behind the lower front grill on the driver's side of the car,and is approximately 4 X 12 inches square.There are two tubes at the bottom of the cooler,and the leak is at the left side of the cooler(when looking at the cooler).Thanks for your help.