using inpa (its in german so using phone to translate) we got code
241 which seems to be cyl 4 misfire
142 module error DMTL
190 and 191 which is oxygen sensor 1 and 2
39 BLS-BTS plausibility
153 lambda probe voltage mach-KAT probe

i drove it at highway speeds while towing about 100 miles a couple days ago. still did the stumble occasionally on initial tip in of the throttle when pulling from a stop or shifting gears but after that it was smooth sailing