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Climate Control Replacement
 
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Pelican Technical Article:

Climate Control Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$180 to $550

Talent:

**

Tools:

Philips screwdriver driver, trim removal tool

Applicable Models:

Mercedes-Benz W123 (1977-85)

Parts Required:

Climate control unit

Hot Tip:

Careful removing the face plate

Performance Gain:

Working climate control

Complementary Modification:

Detail the center console

Removing the face plate that surrounds the climate control unit is probably more difficult than actually replacing the unit itself, but if you use care and follow these procedures you can easily replace the unit without causing any damage to the vehicle. If you are replacing or removing the unit for any reason it is a good idea to replace the bulbs while you have it out. The bulbs are cheap and you might as well freshen them up while you have the unit out.

Over the years your car may have been serviced by multiple people including previous owners and this can lead to parts replaced with different size fasteners and hardware. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches. If something is different on your vehicle please let us know and share your info to help other users. If you have any questions or comments or even a different procedure you would like to share please leave it below and please leave your vehicle information.

Removing the cover plate on your W123 might be the most difficult part of removing the climate control unit.
Figure 1

Removing the cover plate on your W123 might be the most difficult part of removing the climate control unit. The wood trim actually has a metal backing (red arrow) on it that holds it to the face shield in front of the climate control unit. Most people try to use their trim removal tool and pry between the metal plate and wood thinking this is how you get the trim panel off but all you will do is separate the wood from the backing and damage both. As you can see in this picture a previous owner of this project car must have damaged the wood enough that they removed it and just installed the metal backing plate.

There are two cut out areas behind the metal plate that are designed to take the trim removal tool and ensure you get both the wood and metal coming off together (red arrows).
Figure 2

There are two cut out areas behind the metal plate that are designed to take the trim removal tool and ensure you get both the wood and metal coming off together (red arrows).

Get in behind the plate and gently pry it forward until it releases from the climate control plate.
Figure 3

Get in behind the plate and gently pry it forward until it releases from the climate control plate.

With the plate off, you can see the four small openings that the tabs on the plate sit in (yellow arrows).
Figure 4

With the plate off, you can see the four small openings that the tabs on the plate sit in (yellow arrows). The red arrows indicate the cut out areas for your trim removal tool.

Use a Philips head screwdriver and remove the five screws holding the cover plate in place (yellow arrows).
Figure 5

Use a Philips head screwdriver and remove the five screws holding the cover plate in place (yellow arrows).

Remove the cover plate (red arrow).
Figure 6

Remove the cover plate (red arrow).

You can now remove the unit out from the center console.
Figure 7

You can now remove the unit out from the center console.

Figure 8

Remove the bulbs by grabbing them at the their base and wiggling them straight back and out (red arrow)

Separate the rest of the wiring by pulling the two connections straight out from the sides of the unit (red arrows).
Figure 9

Separate the rest of the wiring by pulling the two connections straight out from the sides of the unit (red arrows). Installation is the reverse of removal.

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Page last updated: Fri 12/9/2016 03:04:42 AM