The heater only blows through the pass side vent and not the driver's side vent nor the middle vents no matter what position I have the climate control on. Is this a known problem? Anyone have experience with this problem? Thanks.

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83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
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99 ML 320 Black (lease), 1998 C230 White (lease)
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86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)

Check your heater mono valve.

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MB STARS Master Guild Technician,17 years MB tech
14 years independent shop owner

It's not the heat per se, it's the air coming through the vent...only blowing through the pass side vent.

__________________
85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)

Is there a tube or duct dislocated that I have to re-attach?

__________________
85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)

I don't believe that heat will ever come out of the center vents - just the driver's and passenger sides to defrost the windows, and of course the floor and defrost vents.

The Germans are weird with their climate controls. My old BMWs (635, 735) would allow for cool air to vent through the center vents, but never warm air, even if the heat was turned on max. The owner's manual said that this was to allow for cool air on the driver's face to keep him/her awake.

Troy
1995 E420 86k

Y2kimmel is correct about no heat from the center vents. But you should have heat from both the left and right side vents. Probably one of the vacuum pods has gone south. You can search the board on vacuum pods, but you might be looking at a dash remove job. Not sure if you can access the driver's side from underneath.

Good luck,
Chris W.
'95 E300D