Hello, i can send you a manual in pdf format if you give me an email address.
Normally, the 4.7 has a diesel heater and hot water will be provided by an electric boiler. Both are installed under the bench. The boiler can only be operated with electric energy 220 V. This is the case at my 4.7 (1998 Model). But in my opinion the boiler is not very practical and i dimounted it. For the little hot water for rinsing you can also use the stove.

Regards Kai