Hi, searched but have not seen this problem, heater works intermittently. Can get heater to turn on when I force engine into high vacuum (low gear, let off gas). Any suggestions on where to look. Does the heater control value use vacuum?

Thanks,
Jeff

95 E320 Wagon
89 951s

A weak point in these cars is the vacuum actuators in the center bottom of the dash - hard to get to.

__________________
95 E320 Cabriolet, 169K

Thanks, how do you diagnose those vacuum actuators? What do you have to remove to get to them?

Thanks,
Jeff

E320 Wagon
89 951s