Key legal question
Whether the cantonal court arbitrarily refused a judicial expert opinion on the cause of the engine fissure and the seller's fault
Extracted holding
The refusal to order another expert opinion was not arbitrary; the existing evidence allowed the court to infer negligent use and non-performance attributable to the seller.
Extracted reasoning
The witness testimony, private expert reports, and the seller's prior warning about overheating and highway use were sufficient to support anticipated evaluation of evidence; another expert was not indispensable.