the "check engine light came on on the dash..Got the coputer checked by"vericode" (i believe)..indicated the i need to change 2 O2 sensors (bank1#2 & bank2#1) Had that done and the comp was reset several times but the "CHECK ENGINE" light still keeps coming on after awhile...I didnt have have the exhaust gasses tested(mercedes told me that thats what they actually would do ) Would anyone have any information or idea how to go about this problam..(mercedes is all booked up around here the waiting list is about 3 weeks right now..) Regards George