In this warm weather it could be condensation off the aircon. I had a similar experience with the wife’s 500 recently and thought it was oil puddling under the car.

Use a pen to mark the header tank level (not the easiest to view are they) and make sure it is dropping before looking for a leak.

Doxx said:

What is leaking? Under driver Side (eu Model). The color is Red but I think it is not cooler. I Do not smell anything about this Red liquid.

Gears go on Normal, but now car is parked while repair. I thank anyone Who could tell what should be cause.

Click to expand...

You can see here that the BoxSection has another cold:damp area @50mm 2 inches further back

I suspect something has filled this box with 'Water'..and your drip is Rusty Coloured Water escaping

Has it got a sunroof..? have you always cleared the scuttle drains..??

They are potential ways water can spread around the body structure

Dumb question

Is the CARPET.. floor matting.. DRY ?

Okey, thanks I will show this today to professional. He said that this should be coolant liquid. I write what was wrong when clear.