removal of instrument panel is the 4th step in "Removal and Installation of Heat Exchanger" -found under -Climate Control Manual -Section 1 Heating/ ventilation and air conditioning I
(in my W124 CD)

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/showpost.php?p=831799&postcount=13
http://www.peachparts.com/shopforum/showpost.php?p=831807&postcount=14