Volkswagen's talks with unions over the implementation of its turnaround plan were broken off on Monday, both sides said, leaving in limbo a deal on cost-cutting following the carmaker's damaging diesel emissions scandal.
Labour bosses at Volkswagen (VW) halted cooperation with management on issues including overtime work, efficiency gains and apprenticeships last week, saying executives were trying to squeeze greater savings than agreed in November.
And on Monday VW's works council indicated that tensions between its head Bernd Osterloh and VW brand chief Herbert Diess, who have clashed over how to achieve greater savings, had not eased and called for VW group Chief Executive Matthias Mueller to play a greater role in resolving the dispute.
Unions say Diess, who established a reputation for cutting costs at BMW, wants to cut temporary workers more quickly and deeply than agreed.
VW has said it cannot keep a large number of temporary staff on its books because of shrinking demand for models such as the Golf hatchback and Passat saloon.
"We would welcome if the group's management would more strongly deal with the implementation of the future pact and the compliance with agreements," a works council spokesman said in an emailed statement.
A spokesman for the VW brand confirmed that talks have been postponed, but declined further comment.
But Mueller, in a letter to staff on Monday which was seen by Reuters, indicated he may get more directly involved.
"We as group management and I personally will continue to do everything, so that conflicts are resolved in a constructive manner and VW will be protected from harm," he said.
The so-called future pact will lead to 3.7 billion euros ($3.9 billion) in annual savings by 2020 and foresees 30,000 job cuts at the VW brand without forcing layoffs until 2025.
This plan is seen by analysts as critical to raising profitability at VW's core division, which is lagging rivals including Renault, Peugeot and Toyota . Apart from VW, Volkswagen also owns the Audi, Skoda, SEAT, and Porsche marques.
Europe's largest automaker is having to make cuts to its high-cost operations in Germany to fund a strategic shift and shed costs following the diesel emissions affair, which is costing it billions of dollars in settlements. ($1 = 0.9401 euros) (Editing by Harro ten Wolde and Alexander Smith)