Why Seasons Matter More Than Most Drivers Realise
Most drivers think of car maintenance in terms of mileage intervals — oil at 15,000 km, filters at 30,000 km. But temperature extremes, moisture, and road treatments impose stresses on your vehicle that mileage alone doesn't capture. A car driven 8,000 km through a German winter accumulates very different wear than one driven the same distance in summer.
The good news is that seasonal care doesn't require specialist knowledge. It requires awareness of what changes between the seasons and a few straightforward checks timed to match those changes. Drivers who build this habit typically catch problems early — before they become expensive. For a broader view of what consistent ownership really involves, see habits that experienced drivers maintain.
0.1 bar
Tyre pressure lost per 10°C temperature drop
This relationship between temperature and tyre pressure is a well-established physical principle, confirmed by tyre manufacturers and motoring organisations including the ADAC.
Up to 50%
Reduction in battery output at -18°C
Cold-weather battery performance data is widely published by battery manufacturers and roadside assistance organisations across Europe.
Autumn: Preparing Before Conditions Deteriorate
Autumn is your window of opportunity. Temperatures are falling but roads are still mostly dry, giving you time to prepare before the most demanding season arrives.
Switch to winter tyres before the first frost, ideally by mid-October in central Europe.
All-season and summer tyres lose significant grip below 7°C because the rubber compound hardens. Winter tyres maintain flexibility and provide noticeably shorter braking distances on cold, wet, or icy roads.
Test your battery before temperatures drop below 5°C.
Cold temperatures reduce a battery's available power by up to 50% at -18°C, while simultaneously increasing the energy demand to start a cold engine. Batteries older than four years are particularly vulnerable.
Check and top up windscreen washer fluid with a winter-grade antifreeze solution.
Standard summer washer fluid freezes in the reservoir and pipes, potentially cracking them. A winter-grade fluid rated to at least -20°C also clears road salt and grime more effectively.
Wash the underbody thoroughly in early spring to remove road salt residue.
Road salt accelerates galvanic corrosion on steel brake lines, suspension components, and the vehicle floor. Residual salt continues reacting with moisture even as temperatures rise, meaning a post-winter wash is not cosmetic — it actively prevents structural damage.
Inspect brake pads and discs during spring and autumn tyre changes.
Tyre changes naturally require removing wheels, which provides direct access to brake components. Using this moment to inspect pad thickness and disc surface condition adds minimal time and catches wear before it becomes a safety issue.
Winter: Protection and Ongoing Vigilance
Winter driving places the greatest combined stress on a vehicle. Cold temperatures affect battery output, engine oil viscosity, and tyre grip simultaneously. Road salt — widely used on German and European roads — is highly corrosive and begins attacking exposed metal within hours of contact.
See our guide to driving in poor conditions for advice on adjusting your behaviour when roads become hazardous.
Spring and Summer: Recovery, Inspection, and Heat Readiness
Spring is an active maintenance season, not a passive one. After several months of salt, cold, and wet roads, your car needs a thorough assessment. A proper underbody wash to remove residual salt should be a priority — corrosion continues to develop even after temperatures rise if salt deposits remain.
Summer introduces a different set of concerns: coolant systems work harder, tyre pressures rise with heat, and UV exposure begins degrading rubber seals and interior plastics. Check that your coolant mixture is correct for the temperature range your vehicle will face — most manufacturers recommend a 50/50 antifreeze-to-water ratio, which also provides adequate heat protection.
For a full picture of what maintaining a car costs across the year, see our annual running cost breakdown. And if you're weighing the financial case for keeping up with maintenance, the cost of skipping scheduled servicing sets out what deferred maintenance actually leads to.
Summer Coolant Check Takes Under Two Minutes
With the engine cold, locate the coolant reservoir and check the level against the MIN and MAX markers. If it's low, top up with the correct coolant type specified in your vehicle handbook — mixing incompatible types can damage the cooling system. If the level drops repeatedly, have the system pressure-tested by a mechanic.
Tyres: The Component Most Sensitive to Seasonal Change
No component responds more directly to seasonal change than tyres. In Germany, while the law under StVZO mandates situationsbedingte (situation-appropriate) tyres rather than a calendar-based rule, the practical guidance from the ADAC and most insurers is clear: winter tyres fitted from October through Easter ('O to O') provide substantially better braking on cold and wet roads, regardless of snow.
Beyond the winter/summer switch, tyre pressure deserves regular attention year-round. For detailed guidance on checking pressures and assessing tread depth correctly, see our tyre pressure and tread depth walkthrough.
“The tyre is the only contact point between the vehicle and the road. Everything the car does — accelerating, braking, steering — depends on that small contact patch being in good condition.”
— ADAC Technical Department, Germany's largest motoring association
Where you store your vehicle also affects how seasonal conditions affect it over time. Parking location has real consequences for corrosion, battery health, and tyre longevity.
