“Warning strikes” in the vast sector, numbering some 3.8 million employees, will begin Saturday.

Workers in North Rhine-Westphalia, Germany’s most populous region and its industrial heartland, were among the latest to announce strike action over the weekend.

Management and unions have for weeks been engaged in talks over a new pay deal but failed to come to an agreement before the end of an obligatory negotiation period.

IG Metall has demanded an eight-percent increase for workers in the key sector, which includes around 26,000 businesses in the auto, electronics and manufacturing industries.

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Employers have countered with an offer of a 3,000 euros ($2,980) bonus, valid for the next 30 months.

The bonus could “help” but would be quickly used up as prices for energy and food have soared, said IG Metall chief for North Rhine-Westphalia Knut Giesler.

Employees needed a “quick and durable” to match runaway inflation, he said.

The annual pace of consumer price rises rose again in October to 10.4 percent, figures published by the federal statistics agency Destatis showed.

The head of the employers’ federation Gesamtmetall Stefan Wolf told the Süddeutsche Zeitung daily industry had made a “good offer” despite “very uncertain times” for business.

Talks between the two sides will resume on November 10th.