Heater/Air Conditioner

Up to 8/87





S3 Blower switch (Air quantity switch)
Y13 Switchover valve, fresh air/recirculated air flap
34 Fresh/recirculated air flap
35 Vacuum connection on intake manifold
36 Check valve
37 Vacuum supply tank (except diesel models)
42 2-stage vacuum element for fresh/recirculated air flap


From 09/87 to 07/91





S3 Blower switch (Air quantity switch)
Y13/1 Switchover valve, fresh air/recirculated air flap (2 connections)
Y13/y1 Switchover valve (long stroke)
Y13/y2 Switchover valve (short stroke)
34 Fresh/recirculated air flap
35 Vacuum connection on intake manifold
36 Check valve
37 Vacuum supply tank (except diesel models)
42 2-stage vacuum element for fresh/recirculated air flap


From 08/91





S3 Blower switch (Air quantity switch)
Y11 Valve block (4 connections)
35 Vacuum connection on intake manifold
36 Check valve
37 Vacuum reservoir (except diesel models)
40 Vacuum elements - temperature flap, center outlets
41 Vacuum elements - diverter flap, center outlets
42 Vacuum elements - main air/recirculated air flap


Models with Dust Filter






Color Code:
bl = blue
hbl = light blue
drt = dark red
ge = yellow
mgn = medium green
gr = gray
rt = red
ws = white
sw = black
dgn = dark green