w124 hvac - PeachParts Mercedes-Benz Forum

jfilipcic · #1 06-21-2008, 10:23 AM

Seems my blower motor has decided to crap out on me. I love w124's, I have 2 a 93 cabrio and a 94 e320, but I hate the climate controls. If you push the defrost button it's always hot air, even in the summer time.
So my question is has anyone ever thought of retrofitting a system from a w202 or other series car.
The reason I ask the e320 has its share of maintenance that has to be dealt with along with some body parts that are rusting, so it is going to be my new project vehicle.
So with that in mind and just recently seeing a w202 on the inside the HVAC controls could potentially fit in the stock radio location. But beyond that what and where are the other parts of the system that would need to be installed.
There is going to be the obvious parts like the blower motor, controls, I'm assuming a regulator, and some wiring.
Does anyone have any thoughts?

david s poole · #2 06-21-2008, 10:26 AM

if you say "some wiring" fast it won't sound as bad as the horrendous job it really is.

stevebfl · #3 06-21-2008, 10:55 AM

It would be a whole lot easier to modify the defrost position than to swap systems. A total swap would be impossible as the bodies are too different. If you want defrost without heat, put a toggle on the heater valve.

jfilipcic · #4 06-21-2008, 12:24 PM

Quote:

Originally Posted by stevebfl

It would be a whole lot easier to modify the defrost position than to swap systems. A total swap would be impossible as the bodies are too different. If you want defrost without heat, put a toggle on the heater valve.

Can you elaborate?

stevebfl · #5 06-21-2008, 12:41 PM

If you plan to creat a new system you will obviously have to know how it works, to establish such. While the learning is possible the doing is real unlikely, so instead learn how to remove the heat from the defrost position of your current system. Out of hundreds of activities that take place in the system you would have to recreate, only one creats the heat associated with defrost. Toggle it.