93 mercedes 190 2.6 a/c vacuum bypass
 

question... im getting hot heat from side vents cold air from center vents, i think a vacuum pod under dash is broken making full heat. i also replace the heater valve. is there a way that i can bypass something are rig up something so i can get cold air from side vents, guys i really appreciate the help thank you.

When I had this problem on my '93 190E, it was a defective pod behind the instrument cluster. I applied a solid vacuum to the heater/water valve to keep it closed until I replaced the pod. You can also use a cable tie to keep the valve closed.

what he said. Tee a vac line from the engine and route it too the heater valve. Of course, make sure the heater valve holds vacuum, or you will be introducing a vac leak to the engine side of the vac system.

Edit: maybe you even better to tee the economy gauge line since it behind a check valve and is also in the same area.