I'm not getting much heat in our '91 300SE. I have changed the Mono-valve insert. Still not much heat. In review of threads, it sounds like the next part to check is the aux pump. Where would I find this critter??
Thanks for the help.
Steve

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Steve Short
'91 300SE sold
'92 190E 2.3 sold
'99 S420
'06 Mini Cooper S
'08 Triumph Rocket III
'02 CLK430