P2029-002 error code

[wlpend]

2005 CLK200K, A209, only had the car a few weeks and now keep getting this code P2029-002, selfadaptation of mixture formation at lean stop: Tendency of engine towards “rich”.
Any help in direction to fix it would be appreciated.

 

[Larkone]

There seem to be two TSBs covering this

http://ww2.justanswer.com/uploads/73bbchevy/2010-01-27_144638_p2029.pdf

https://www.techtips.ie/Hella-Ireland/mercedes-c-class-e-class-clk--slk---fault-codes-p2029-p2046-p201a-p201c.pdf

 

[wlpend]

Have now found that if the fault code P2029.002 is removed and heater switched of it is replaced with fault code P202B.008!