Tire pressure check

You should only check the air pressure when the tires are cold, as the tires heat up and the pressure rises while driving. Consequence: You will get distorted values and, in most cases, you will drive with too low tire pressure. If, with regular checks every three to four weeks, tire pressure drops by 1.5% per month, then this is normal. If the tire is losing more air, then you should inspect it carefully: fermentation often occurs under the outer surface.

Cold tire pressure readings (bar)

Model: Sedan/Station wagon

Tire size*	Normal load up to 3 persons		Full load over 3 persons
	ahead	behind	ahead	behind
175/70R14	2,2	2.2	2,2/2,4**	3,1
185/60R14	2,2	2,2	2,2/2,4**	3,1
195/60R15	2,2	2.2	2.2/2,3**	3,1
195/55R15	2,0	2,0	2,2/2,5**	3,1
205/50R16	2.2	2.2	2,2/2,4**	3,1
125/80R15***	4,2	4.2	4,2	4,2

* summer tires
** cars with diesel engine
*** emergency wheel. At continuous speeds above 160 km/h, increase the air pressure in all cases by 0.2 bar.

Do not forget to screw on the protective caps on the valves

After checking the tire pressure, the valves in the tires must always be closed with protective caps. If dirt gets into the valve, then relative tightness will come to an end - the tire will now lose air constantly. Therein lies the danger. Never drive with too low tire pressure - the tire temperature will rise excessively. Sooner or later, this will surely cause delamination or tire burst phenomena. And high blood pressure (by about 0.2-0.3 bar) can be advantageous: steering is more responsive, tires are kept further and fuel consumption is slightly reduced. Drawback: The car rolls a little harder.