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Hello everyone, the coolant light of my 2018 GLC300 was on recently and I found the coolant level dropped significantly in the coolant reservoir. I checked the bottom of the car by taking off bottom covers and found pink residuals shown in the picture. The picture was taken from bottom of the car and near the driver side. It looks like the coolant was leaked from somewhere on top of this metal piece. Would anyone know where the leakage could most likely be? Thanks a lot!
That big metal is Auto transmission which has no coolant connection.
My picture red mark is, i think, a coolant hose just upper side of your picture. Check around the hose, which might have a loosen connection clamp.
Thank you so much and I disassembled the parts around it by following a Youtube video. I found more pink residuals on a bracket near the coolant feed line as shown in the first picture attached here. And I checked the part number A2742002451 on the square plastic part connecting two coolant feed lines. The part I checked is shown in the second picture here.
Since I've disassembled the intake manifold, inter cooler, etc., I couldn't do a pressure test to confirm that is the part leaking. I also didn't and couldn't see pink residuals or cracks on the coolant lines and the square plastic part due to tight space. My question now is if you think the part in the second picture here is the one I need to replace. I appreciate your response.
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