I have a 2008 Fortwo Passion Cabrio. I find that the heater core still
puts out heat, even when the temp slider is pulled all the way downt to
the cold setting. On a nice 5-degree C fall day, the cabin often gets
unberably hot. Even in subzero weather it can begin to feel too warm on
long drives. Thank goodness it's a convertible and I drive almost
entirely with the top down during the summer. If I run my A/C, it simply
has to work against the heat that you can easily feel if you hold your
hand up to the vents. I have never put a thermometer into the airflow,
but I would guess the temperature of the air exiting my dash vents to be
somewhere between 50 and 60 degrees celsius (120 to 140 F) with the
slider as cold as it goes.
I've asked Mercedes to look at it twice now. The first time they said there was nothing wrong and the second time they replaced the mixer valve, mostly to make me happy. This has had no effect at all. Now my
warranty is almost expired, and I'm wondering if anyone has a similar
This is an easy fix. You should raise hell with your dealer. Us rednecks who would never be seen dead near a Mercedes dealer just take a little vice-grip plier out of our great big toolbox, wrap some electrical tape around each grip, crawl under the back of the car, then gently pinch shut the heater hose and lock the vice-grip inplace. There is no way -- NO WAY! -- we would ever tolerate, not for one day, not being able to hang our beer in front of the A/C vent to keep it icy cold in the summer with the top down. Oh, if your engine overheats, ya picked the wrong hose.
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