I am looking for some guidance for a 2007 CLS550. The vehicle has about 100,000 miles on it and is is throwing random P2240 (Sensor Positive Current Control Circuit / Open Bank 2 Sensor 1) and P2237 (Sensor Positive Current Control Circuit / Open Bank 1 Sensor 1) as well as various P0300 (Random/Multiple Cylinder misfire) codes.
It has new plugs and new upstream O2 sensors but nothing changes. It shakes and gives out a "running rich" smell and black soot on the tailpipe tips
Can anyone give some thoughts on this or know a good reputable shop in the Houston, Tx area that may be able to figure this problem out? Thanks.