Nathalie,
Consider the following sentence:
Folgen Sie mir! / Follow me!
Mir is the appropriate pronoun. Mich is not, because folgen is a dative verb.
Consider the following sentence:
Koennen wir Sie/Ihnen folgen? Some say Sie is the appropriate pronoun, others say Ihnen is the appropriate pronoun.
Which pronoun is correct?
Dative Verbs

SRA11
June 19, 2011

David-L5
June 29, 2011
ihnen

Jorge-D1
December 30, 2011
Why?

melly
January 3, 2012
ihnen

Paul-Weber
March 22, 2012
Hi,
The appropriate pronoun is "ihnen". The verb folgen is a dative verb. In general "Sie" changes in the dative case to "ihnen". "she"/sie changes to "ihr" , "they"/sie and "formal you"/Sie changes to "ihnen".
Other examples for dative verbs are; danken=to thank, antworten= to answer, helfen=to help and gefallen=to like.
Examples: Ich danke ihnen. Ich antworte ihnen. Ich helfe ihnen. Ich gefalle ihnen.
I hope this helps!
Paul