1998 Mercedes Benz CLK 320 Coolant Leaking

Asked by Jill Nov 23, 2019 at 12:11 PM about the 1998 Mercedes-Benz CLK-Class CLK 320 Coupe

Question type: Maintenance & Repair

I have a 1998 Mercedes Benz CLK 320. The coolant pours out after every trip.
It can be as little as 20-30 miles. We have checked the radiator, lines, coolant
reservoir and pressurized the lines and can’t find where it’s leaking. We have
even put 2 types of stop leak in it and it only lasted about a month each and
then the coolant started pouring again. You can smell the coolant at times
inside the car. What else can we look for?

1 Answer

2,605

Well, there's always the climate control system, but I suspect the problem is a blockage somewhere, probably the radiator. Get it to a radiator shop and flow test the rad. as a first step. Also visually check and just replace for the hell of it, the thermostat. If you have any sort of restriction, the stop leak will only exacerbate it. Start from the beginning with a good diagnostician.

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