Originally Posted by throne7

Hello everyone, I am finally getting around to working on my project again after a few months away from it. Question: Where do I pour replacement coolant fluid for my 1987 260E 2.6L M103? It has a leak and the coolants are almost gone. I just want to top it up with fresh coolants so I can investigate to make sure I know where the leak is coming from. I looked at the radiator but don't find the radiator cap that normal cars have where you can unscrew it and just pour in coolants. Is the reservoir tank the only place you can add fluids into the radiator on this car?