Mercedes Benz introduced an 'Airscarf' in their new Cabriolet. An airscarf blows warm, or cold air onto the driver and passengers neck and shoulder areas. It also tends to warm up the seat back nicely.
It operates using the existing heating system and is really quite simple to do. It costs around £6.50 per seat to do this mod. The Mercedes brochure says this -
The 'Airscarf' is a popular option that works very effectively to warm the occupants' necks when travelling top-down and this costs an extra — but not unreasonable — £350. For the UK weather, it really is a 'must-have' item.
So, £350 or £6.50 for hot air. It's a 'no brainer' really.
If you want to do the mod for yourself and your passenger here is 'how to' do it. The video and pics below show what it does and how it can look when finished - The 'final look' is ultimately your own individual choice.
I fitted thermometers to gauge temperature improvements using the airscarf.
A simple scented air freshener with spinning vents. These can be colour coded to suit your car and when you complete your journey you will smell like a pine forest or a peppermint.
Old Range Rover Vogue vents. Sprayed with dash shine to look like new.
A slot grill from an old PC.
Other members / owners submissions -
How to make an airscarf -
It only takes around ten minutes or so, once you have the parts, to have the mod up and running. If you want an airscarf for both seats, you will need two 'Henry Hoover pipes'. They're £6.49 each on fleabay currently. I used them as they're much cheaper than ducting pipes but channel the hot air just as well.
Any reasonable diameter ducting pipe, up to around 40mm wide, can be used. Another chap used 28mm fishpond pipe and reported that it worked well. You will need approx 7ft ducting pipe for each airscarf. The hoover pipes are 2.5m long. That's around 7ft.
Cut off both end bits. So, all you have left is the long 2.5m pipe.
Slip the pipe under the seat and up the back of it. My storage bags provide good cover. But you won't see the pipe once the seat is pushed back into its' usual position.
Remove the footwell light panel and insert the pipe.
Resecure the footlight panel.
Insert the other end of the pipe under the headrest. The headrest holds it firmly in place. I didn't cut the pipe as I wanted to use it for the
'Defroster mod' which you will see shortly.
This is how it should look now. Feel free to test the airflow on your neck at this point.
The new Airscarf mod is in position and working. But it's not as pretty as it could be. It will be up to the owner to make it look nice by finding a suitable cover for the pipe showing under the headrest. Alternatively, you could just hide the pipe behind the seat when not in use. I found that I now use mine daily, roof up or roof down. Warm air is always nice.
Below there are pics of prototype cardboard shapes that provide the best hot airflow to the back and neck. Try to find something that looks nice, like I did, but still directs air to where you want it.
Best airflow prototype shapes.
Showing what's visible once it's done.
Further mod adjustments - 06/11/11 - Taped around the vents to maximise airflow to the headrest pipes.
View from behind the taped vents.
View from above when closed. Nothing shows.
Driving around on a night that was minus -3C below freezing point. The airscarf provided 31.9C heat to the drivers neck and back area. You can't beat hot air on your back and neck when it's that cold.
Here's another look that I tried. I didn't particularly like it though. Your look will be up to you.
The Defroster mod
Click here for defroster mod pics in use in icy conditions.
Our cars, if you have a plastic screen fitted, don't have a a rear screen defroster.
I figured that most of us will have the roof up when it's icey and therefore we won't be using the airscarf. So, by simply pulling the pipe from the headrest, and pointing it towards the rear window, it should melt the ice in a short time. You can then drop the roof safely minimising the likelihood of cracking the rear windsceen panel.
That's it. Two simple yet effective mods that don't cost the earth. Hope you try them yourselves and are as impressed as I am with them.
Notes;-
1. Point the heater towards the windscreen setting if the airscarf becomes too hot for you, or too cold in the morning until it warms up.
2. Tribute is paid to David Aiketgate, PQD44 and Broon who inspired me to do this mod.
For further info click here.
3. Another person tried this mod with a 'washing machine discharge hose' and reported that the benefits were negligible, unless on full fan setting, probably due to too small a bore circumference on the hose. In that case, I would add that you must ensure a good seal at the place where the pipe connects to the vent by using tape or sponge if there isn't enough force to push the air out at the headrest area. Mine is sufficiently warm on setting number 2 on the fan, once the engine is warm, because I modded the vents with some tape to stop air escaping around the pipe. That effectively feeds the air into the pipe correctly. It then goes to where it is required, at the headrest outlet.
4. The colder it is outside. The more you feel the benefit of this heat. Especially if you're a 'top down nut' like me.

It does work equally well with the roof up. Or so my wife tells me.
5. If you want storage bags like mine. They're here;-
Storage bags link, click here.
I tried the mod with 2 airflow pipes (one in each of the footwell heater vent apertures, shown in the pic below). They both fitted well enough and were not too inconspicuous. It allowed me to turn the heater down to level 2, a slight noise decrease from level 3, but no real difference in the job it was doing in keeping me warm. So, one pipe is plenty. Around town I use setting one. Two or three when driving up to 80 mph on the motorway.
Update January 2012 - On my drive home from work at night I check the thermometer attached to the top of the airscarf vent when I have to stops at lights etc. The thermometer usually shows between 25c and 35c. Considering the ambient temp outside has been as low as minus -9c, the airscarf is perfect for nullifying the windchilled draft I used to suffer across my shoulders. A perfect little mod at a perfect little price. Should you ever decide to make your own, then feel free to ask any questions that arise as you do so.
Update June 2012 - 11200 miles done in the car. Roof up for 470 of those miles. That's a pretty good ratio for a ragtop in the UK. Now, something that never occurred to me. On those rare hot Summer days, the airscarf blows cold too.
All the best from the T-Bar.