I love my 2002 E320 CDI Wagon with its rust in all the right spots (mostly all over body) that won't interfere with MOT's. But one thing on it I can't seem to get any satisfaction from is the Heater Boost switch next to the cigar lighter! This switch according to the handbook only works if outside temp is below 8c, and should be activated with red light in switch whenever this is the case, however when used all last winter the heater never seemed to be any more efficient with it on or off. So if the light is on it should work in same way as the heating / aircon does - or in other words aircon only works when red lamp in EC switch will only work when lamp is OFF - Which seems to be opposite of all other cars to me where aircon is activated and a warning lamp is ON to draw your attention to it. SO is this what or how the aircon still operated on E classes made after 2002? And only comes on when red light is off!?! Its all ass backwards!