Skip to main content

ADAC

ADAC Study: Winter Tires Lose Grip Fast Below 4mm Tread

Munich – September 10, 2026 -- German auto club ADAC has found that winter tires start losing significant safety performance once tread depth drops below four millimeters, well above the legal minimum of 1.6 millimeters allowed in Germany.

ADAC tested five tires worn down to specific depths

Researchers took five winter tires from different manufacturers and price ranges and used a specialized machine to wear them down to four millimeters and two millimeters of remaining tread. The tires then underwent handling and braking tests on wet and snow-covered surfaces.

ADAC Warns of Heavy Traffic as Summer Holidays End in Germany, Austria

Munich – September 09, 2026 -- Drivers across Germany, Austria, Switzerland and Italy should brace for heavy congestion this weekend as the return wave from summer holidays collides with ongoing vacation traffic, the ADAC warns.

With school holidays ending in Bavaria, Baden-Württemberg and the last Austrian regions, return traffic from the south toward the north is expected to peak. At the same time, outbound traffic toward the Alps, lakes, coasts and low mountain ranges remains elevated.

Friday evening and Saturday carry the highest risk of gridlock

The ADAC identifies the worst congestion windows as Friday afternoon and evening, Saturday morning, and the return rush from Saturday afternoon through Sunday evening.

ADAC Warns: R134a Car AC Refills Set to Get Costlier and Scarcer

Munich – September 07, 2026 -- Owners of older cars running on the R134a refrigerant could soon face pricier and harder-to-schedule air conditioning maintenance, according to Germany's ADAC motoring club. Tighter EU rules are further restricting the use of R134a, while no widely available, legally approved alternative exists yet for the existing vehicle fleet.

New cars have banned R134a since 2017
New passenger vehicles have not been allowed to use R134a since 2017, and some workshops now offer conversions to the newer, more climate-friendly refrigerant R1234yf. However, existing R134a systems are generally not built for that swap, and ADAC says clear approvals and technical sign-offs for such conversions are still missing -- raising open questions about vehicle operating permits and liability.