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Old 06-15-2019, 10:34 AM   #1
Ed463
 
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Default Retro. Fit Aircon

I know you guys may find this hard to believe but our 2008 Sprinter doesn't have air con/climate control

So. I can collect all the required components together quite easily for maybe $3-400.
Head unit.
Wiring loom.
Compressor.
Evaporator
Piping
Heater matrix etc.

I feel happy enough with the nuts and bolts part of the installation.

However, will it actually work or will the voodoo/black magic integrated electronics of the Sprinter refuse to accept it?
Any thoughts gratefully received.
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Old 06-15-2019, 12:51 PM   #2
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Default Re: Retro. Fit Aircon

It is virtually guaranteed that any electronic part is somehow on a CAN bus, and actually turning it on or off is done by a computer.

I'd look at the wiring diagrams, and see if you can find someone to code it.

As an example of something simple made complex, the headlights on my Dodge Caravan are on one signal path from the switch to the instrument cluster, then on another bus to the TIPM, which then actually turns on the headlights. The parking lights and turn signals are on a different CAN bus....

I might get it fixed soon...

I bet that it would be much easier to get an aftermarket add on AC installed and operational compared to installing an OEM system and getting it operational. Good luck.

Last edited by danski0224; 06-15-2019 at 01:04 PM.
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Old 06-15-2019, 01:50 PM   #3
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Default Re: Retro. Fit Aircon

I will watch this one with interest Ed.

I also have a 2008 and it also lacks that one essential feature so if you can manage to get it to work then I might well follow in your footsteps...
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Old 06-15-2019, 02:32 PM   #4
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Default Re: Retro. Fit Aircon

Quote:
Originally Posted by danski0224 View Post
It is virtually guaranteed that any electronic part is somehow on a CAN bus, and actually turning it on or off is done by a computer.

I'd look at the wiring diagrams, and see if you can find someone to code it.

As an example of something simple made complex, the headlights on my Dodge Caravan are on one signal path from the switch to the instrument cluster, then on another bus to the TIPM, which then actually turns on the headlights. The parking lights and turn signals are on a different CAN bus....

I might get it fixed soon...

I bet that it would be much easier to get an aftermarket add on AC installed and operational compared to installing an OEM system and getting it operational. Good luck.
I'm an electrical engineer (big stuff) I'm convinced there are no electrons involved. It is voodoo and black magic.
My initial plan was aftermarket but using Sprinter compressor, radiator, hoses etc. But I do like the factory look!
I've spoken to someone who sells "kits" of Sprinter components who says it's easy. But (as he's selling the parts I guess) he's been a little vauge on the install
The Chinese aftermarket evaporator are cheap $80. But they look cheap!!
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Old 06-15-2019, 02:35 PM   #5
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Default Re: Retro. Fit Aircon

Quote:
Originally Posted by sparkplug View Post
I will watch this one with interest Ed.

I also have a 2008 and it also lacks that one essential feature so if you can manage to get it to work then I might well follow in your footsteps...
At this moment in time I'm sat indoors. It's 38C outside so I do fancy getting this done.
I've been told Merc. do a retro fit kit. But you don't want to know the price!
So it's possible. But I don't have the patience or the skill set to get bogged down in canbus or body control module stuff.
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Old 06-15-2019, 04:31 PM   #6
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Default Re: Retro. Fit Aircon

My Caravan HVAC has its own module, and it is connected to the CAN system.

No reason to think that Mercedes is any different.

Being in the UK, it is probably much easier for you to find someone at a dealership willing to turn on the HVAC in the computer system than someone in the USA.

However, I am still of the opinion that an aftermarket system will be easier and less expensive to get up and running. I wouldn't doubt that the Mercedes compressor is on the CAN system too.

I strongly urge you to look very closely at the wiring diagram.
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Old 06-15-2019, 05:38 PM   #7
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Default Re: Retro. Fit Aircon

Quote:
Originally Posted by danski0224 View Post
My Caravan HVAC has its own module, and it is connected to the CAN system.

No reason to think that Mercedes is any different.

Being in the UK, it is probably much easier for you to find someone at a dealership willing to turn on the HVAC in the computer system than someone in the USA.

However, I am still of the opinion that an aftermarket system will be easier and less expensive to get up and running. I wouldn't doubt that the Mercedes compressor is on the CAN system too.

I strongly urge you to look very closely at the wiring diagram.
Anyone got a wiring diagram?
I think you're correct re. the compressor
I also think you're correct about finding someone with the correct skills to enable it, should be easy enough. My concern would be if the body control module was an old version which can't be updated to recognise the hvac control unit.

Last edited by Ed463; 06-15-2019 at 05:40 PM.
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Old 06-15-2019, 05:47 PM   #8
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Default Re: Retro. Fit Aircon

I'd PM "Sprinter Man Sam".

That person has added a bunch of stuff to his Sprinter, has had it coded at a dealership and is in the UK...

User name spelling or capitalization may be a little off, but search and you will find.

If memory is correct, a subscription to TechAuthority (or close to that) will get you wiring diagrams, but you will need the VIN from a van like yours, but with AC.

Last edited by danski0224; 06-15-2019 at 05:50 PM.
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Old 06-16-2019, 01:49 AM   #9
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Default Re: Retro. Fit Aircon

If everything fits, is it possible you could retrofit an older style clutch controlled compressor with internal displacement control? My thought is is that as long as you have a working expansion valve that type of system can work with purely a manual switch for the clutch.
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Old 06-16-2019, 08:00 AM   #10
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Default Re: Retro. Fit Aircon

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Originally Posted by Midwestdrifter View Post
If everything fits, is it possible you could retrofit an older style clutch controlled compressor with internal displacement control? My thought is is that as long as you have a working expansion valve that type of system can work with purely a manual switch for the clutch.
I'll ponder that. It's certainly possible to purchase a new compressor with a simple clutch.
I must admit aircon isn't something I've any knowledge about, but I was trawling eBay for something and noticed how easy and cheap it is to pick up genuine MB Sprinter AirCon components.
At the time it was 38C 100F in the shade, so you can see why I ended up with this thought
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