How to dial a mobile number in Mexico city from Europe?

You dial your international access number depending on your country. In some countries is 00 in others is 001, etc. then:
country code : 52
special code for mobile access: 1
the area code: for example 55 for Mexico City
then telephone number: xxxx-xxxx

so u dial:

xx-52-1-yy-zzzz-zzzz
or
xx-52-1-yyy-zzz-zzzz

where:
xx is the international prefix for your country
yy is city area code in Mexico (55 for Mexico city)
zzzzz ; telephone number

some cities have 2 codes for area code and then 8 digits for telephone number. Some other cities have three digits for area code and seven digits for telephone number.

with a phone

It depends where in Europe your calling from. Check out Time Dial

Dialing Mexico = http://www.timedial.net/default.asp?Coun...

Select overseas to CPP mobile

Time Difference Calculator = http://www.timedial.net/timedifference.a...

0052-1-55 + 8 digit number for mobile phones in Mexico City
0052-55 + 8 digit number for landlines phones in Mexico City