Date registered: Jan 2008
Vehicle: 1973 W115 200 /8
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IT can of course be the matrix.. But it's an easy DIY-job to check the valve.. Much, much easier than removing the heater from inside the car..
-You could also try to flush through the heater matrix with a garden hose..
AND, you could also try to se down the grille by the windshield if the matrix is clogged up with leaves or something else ?
1991 W140 400 SE - SOLD !!
1973 W115 200 -For sale as project.