2007 Mercedes-Benz E200 with engine code P2029. What is the cause of this code P2029?

Question

2007 Mercedes-Benz E200 1.8L with engine code P2029. What is the cause of this code P2029?

Answer 1

P2029 Adaption of mixture formation at rich stop

This is also known as P0172 Which is fuel trim too rich Bank 1. Vacuum leak, this is the main reason for this code condition. especially at the crankcase breather area

Answer 2

P2029 Mercedes-Benz Code - Fuel Fired Heater Disabled
Read more: https://www.autocodes.com/p2029_mercedes-benz.html