The 300M has been assigned 215 TSBs over 6 model years.
TSBs contain recommended steps and procedures for diagnosing or repairing a known problem. They are issued directly by Chrysler to service technicians. You'll often see TSBs used as evidence in lawsuits when owners feel the automaker should help with repairs.
A TSB can cover multiple models and years. The 1999 300M has been involved in the most campaigns with 141 total service bulletins.