Dec 8, 2012 #1 ducatiboy Member Joined Oct 20, 2012 Messages 40 How to know if my aux heater is working on my mercedes s class
Dec 8, 2012 #2 stwat MB Enthusiast Joined Jun 20, 2004 Messages 3,176 Location Sheffield Car 1989 W126 300 SE Set it to come on at a certain time then check if the car is warm not long afterwards?
