Kernrechtsfrage
Whether the lease contained a sufficiently clear special agreement making accessory charges payable by the tenant.
Extrahierter Entscheid
No. The contract fixed monthly advances and a final settlement, but did not specify which accessory charges were owed; payment of advances did not replace the missing agreement.
Extrahierte Begründung
Under Art. 257a(2) CO accessory charges are borne by the tenant only if specially agreed. The contract did not describe the charges clearly and specifically, and the appellant's factual assertions were inadmissible.