In an effort to improve the W202 forum, we're starting a "common problems and their solutions" thread for W202's. Before posting a new thread in the forum with your question, please check here for a solution as well as doing a search. For readability, please post in this forum in the following format:
Problem Description
Problem Cause
Solution (or link to thread with one)
Problem Description
Problem Cause
Solution (or link to thread with one)