Hey all.... I have a 91 1800cc UK Merc 190E... I have had the car for two years and one problem has been bugging me the whole time I've had it - the heater! The car doesn't have AC and the blower appears to have only two settings - freezing cold or red hot - nothing in between... have asked around and one person mumbled something about a "duo-valve" that controls heat regulation. Can anyone confirm such a thing exists and maybe give some idea as to the location of it?! Also, there are two heat control dials on the dash....why two? Is it for front and rear control, or driver / passenger control? I'm guessing there is a fault with mine as either one I turn, makes all vents blow the same
Thanks in advance for any help! Regards, Dave