* Munich prosecutor searched Jones Day offices on March 15
* Court dismisses VW's legal against searches
* VW says Germany's highest court must now decide (Adds Volkswagen comment)
MUNICH, May 15 (Reuters) - Searching the offices of Volkswagen's law firm was not illegal, a German regional court said on Monday, prompting the carmaker to say it would lodge an appeal with Germany's Federal Constitutional Court.
In March, Munich prosecutors searched the offices of Jones Day, a U.S. law firm hired by Volkswagen to investigate its emissions scandal, stepping up efforts to identify those involved in Volkswagen's emissions-test cheating scandal.
Volkswagen, Europe's biggest carmaker, has condemned the search and filed a legal complaint.
It said on Monday it would now take the matter to Germany's highest court, the Federal Constitutional Court.
"The Munich regional court's decision in now way gives us reason to change our legal position," it said in an e-mailed statement. (Reporting by Joern Poltz; Additional reporting by Jan Schwartz; Writing by Maria Sheahan; Editing by Georgina Prodhan)