In an action to recover damages for injury to plaintiff's automobile resulting from a collision between automobiles owned and operated by plaintiff and defendant respectively, defendant counterclaimed to recover damages for injury to his automobile. Plaintiff appeals from a judgment of the County Court, Suffolk County, entered upon a verdict in favor of defendant on plaintiff's cause of action and in favor of the defendant upon his counterclaim. Judgment reversed on the law and the facts and a new trial ordered, with costs to appellant to abide the event. The trial court erred in permitting cross-examination of the plaintiff with respect to his involvement in prior accidents. ( Grenadier v. Surface Transp. Corp. of N.Y., 271 App. Div. 460. ) In view of the sharp conflict in the testimony of the plaintiff and the defendant, who were the only witnesses called, we may not disregard the error by virtue of section 106 of the Civil Practice Act. Nolan, P.J., Wenzel, Schmidt, Beldock and Ughetta, JJ., concur.