Upgrade kit for your auxiliary heater
Does your Grand California have an auxiliary heater? Then upgrade it to an auxiliary heater! All you need is the appropriate CAN gateway T6.x, and your Cali will now have an auxiliary heater.
How do I know if my vehicle has an auxiliary heater?
It's very simple: If your VW Crafter, Grand California or MAN TGE has an auxiliary heater, you will find a "Webasto" sticker on the left B-pillar.

My vehicle already has an air heater – is a water heater still worth it?
Yes, definitely! Even if your vehicle is already equipped with an auxiliary air heater, it may be a good idea to upgrade the existing heater to a water heater. Why? It's simple: The air heater only warms the interior, not the coolant or the engine. And since the warm air comes from the rear vents and not from the vents on the windshield, it takes forever for your windows to finally defrost.
How do I control the fan in the interior?
Don't worry, it's super easy. Included in the delivery is a module that simply plugs into the connector on the back of the climate control panel. This will control the interior fan, and you're ready to go.
Which controls can I use?
After the upgrade, you can easily turn the heating and ventilation on and off with a +12V signal. Whether you use a switch, button, or other control element – anything that provides a +12V output signal will work. And if you select a control element when ordering, the appropriate connection cable for the CAN gateway is included.
Benefits of upgrading?
• No major modifications to the vehicle necessary
• No software update for the auxiliary heater
• Perfect for leased vehicles because the upgrade can be easily reversed
Technical data:
• Power supply: 10-15V DC
• Current consumption: Standby < 1mA
• Dimensions: 63x60x22 mm (LxWxH)
Scope of delivery:
• CAN Gateway T6.x for controlling the auxiliary heater
• “Smart Switch” for controlling ventilation
• Vehicle-specific Y-cable
• Wiring harness for the interior fan
• Operating instructions (download)
• Connection cable for control element (depending on selection)
Would you like to have the set assembled?
No problem! We offer the option of performing the upgrade directly at our facility in Kempen. Simply select the desired kit and the "Installation" option. After your purchase, we'll contact you to schedule an appointment.
Important NOTE:
Error messages may occur in some control units during auxiliary heating operation. But don't worry, this is completely normal and has no impact on your vehicle's operation!
Danger:
The conversion is not compatible with vehicles from MY25 onwards.