Tyre properties, tyre tests and labelling:
Tyres test results: 
Every year dozens of tyre tests in all segments (winter, summer, SUV, all-weather, ...) are driven and published by magazines, automobile clubs in Europe and other independent test organisations.
The results of the tests carried out by these organisations can be read on this page under "Test reports" for the displayed tyre.
Tyre label: 
The European Tyre Labelling Regulation lays down information requirements on fuel efficiency, wet grip and external rolling noise of tyres. The aim is to improve road safety, environmental protection and economic efficiency by promoting fuel-efficient, safe and quiet tyres.
Classes A and B are classified as "very good". (Classes A+ or A++ do not exist)..
The results can vary greatly from one tyre size to another and from one tyre type to another (summer, winter, 4x4). However, the ratings are comparable between different tyre models and brands of the same size and type.
The tyre label doesn't say everything, because it doesn't contain winter performance of winter or all-weather tyres.
Original equipment tyre markings: 
* = BMW
M3 = BMW M3
AO = Audi Original Reifen
AOE = Audi Original Reifen mit Notlaufeigenschaften
RO1 / RO2 / RO3 = Audi Original Reifen für Fahrzeuge der quattro GmbH
MO = Mercedes Original
MOE = MO Extended, Reifen mit Notlauf-Eigenschaften für Mercedes
J = Jaguar
N0, N1, N2, etc. = Porsche
F = Ford
G = Opel
S1 = Peugeot
K1, K2 = Ferrari
Tyre markings with emergency running properties / Runflat: 
The so-called "self-supporting tires" allow in the case of a
tyre damage the continuation of the journey at reduced speed
(max. 80 km/h, distance of at least 80 kilometres) without significantly impairing driving stability.
CSR = ContiSupportRing
DSST = Dunlop Self Supporting Technology
EMT = Extended Mobility Tyre
HRS = Hankook Runflat System
PAX = Notlaufreifen mit Stützring auf der Felge
ROF = RunOnFlat
RFT = Run Flat Tyre
RSC = Runflat System Component BMW
SSR = Continental Self-Supporting Runflat Tyre
SST = Self Supporting Tyre
ZP = Michelin Zero Pressure
Tyre marking Vehicle load: 
XL = Extra Load: Verstärkter Reifen für erhöhte Fahrzeuglast (mit erhöhtem Lastindex)
EL = Extra Load: Verstärkter Reifen für erhöhte Fahrzeuglast (mit erhöhtem Lastindex)
rf = renforcé: Verstärkter Reifen für erhöhte Fahrzeuglast (mit erhöhtem Lastindex)
LT = Reifen für Light Truck (Leicht-Lkw)
C = Reifen für Transporter und Leicht-Lkw mit besonderer Tragfähigkeit
Further tyre labels: 
M+S / M&S = Mud and Snow, Matsch & Schnee für Winter-, Allwetter- und Offroad Reifen.
All Weather = Ganzjahresreifen
TL = Tubeless, Schlauchloser Reifen, dieser Reifen darf nicht mit einem Schlauch montiert werden
TT = Tube type, dieser Reifen muss mit einem Schlauch montiert werden
GRNX = Michelin Green X, Kraftstoff sparender ökologischer Reifen
SI = Seal inside
ContiSeal = selbstabdichtender Seal-Reifen von Continental
Tyre marking for rim protection: 
The designations for tyres with rim protection strips vary from manufacturer to manufacturer:
FL (Felgen Leiste), FP (Flange Protector), FR (Felgenrippe), RPB (Rim Protection Bar), FSL (Felgenschutzleiste), ML (Mit Leiste), MFS (mit Felgenschutz).
