zneB-sedecreM

This is a W215 I've seen on some German website that the owner customized. I don't really like how he did it, but while looking closer I saw something that I have never seen in a CL. It's the button on the center console above the Distronic buttons. At the bottom it's the scroller which you set the distance from the car in front of you. The middle button is the one that enables/disables the sound if you want the car to 'beep' telling you that you need to physically break. But what does the button on top of that do!? I have never seen it before, and upon closer inspection and zooming in, it appears to have a heat wave looking thing on the button with 2 settings on it like the lower and raise button..



Can anyone fill me in as to what option that is? Is it like a heater for the cupholder or something to keep your drinks hot?
I know it's a pre-face lifted model, but I have never seen that in the CL. Interesting

v8mercedes

this button is for the auxiliary heating system. you got the option for the pre face lift models as soon as in the face lift models too.

you need in in cold germany......

zneB-sedecreM

I'm not quite sure what that means... What happens when you press it once, then press it a second time?
At least I was close and figured it had something to do with heat lol

awiner

The auxiliary heater (Zusatzheizung, code 228) is a separate heating
system that works independently of the engine. It consists of a
separate burner unit, an electric water pump, a control unit and it
is connected to the coolant circulation of the engine. It is run on
the fuel of the car (either diesel or petrol, these are different
units for obvious reasons) with a separate fuel line from the tank.
This makes it independent from an electrical outlet and from the
engine. It is started either manually, with a timer (mounted on the
center console or in the glove box) or via a powerful FM-wireless
remote (the Mercedes units for from about 500 to 1000 meters
depending on local circumstances. The latest versions are available
with mobile phone remote control as well.

Once it is started, a spark plug ignites the burner which heats the
coolant up and the water pump recirculates the water through the
engine. The system heats the coolant up to 80°C and works until that
temperature is held in circulation. Once the temperature of 55°C is
achieved, a separate relay starts the heater blower and this heats up
the interior.

Even at very low temperatures in Alpine or Siberian regions, this
heats up the engine and the interior within 20-30 minutes. Apart from
a warm seat when you step in, the heat melts all snow and ice on the
windows without further ado.

Very comfortable and a must in Southern Germany, Switzerland and
Austria.

Many German Taxis have it as well since it helps them keep warm in
Winter when the wait and have no engine running.

zneB-sedecreM

Wow! Great info and I'm assuming rare option for the W215. That sounds like a very useful feature. I wonder if this could be retro-fitted. Thanks for the amazing reply!

awiner

Anything can be retro fitted. Just time and $$$