With a misfire happening on both banks I'd be looking at the MAF, MAP, and TPS. Those DTCs are standard OBD-II, for an in depth look it takes something that can scan the extended Mercedes codes. e.g. an Autel or iCarSoft scanner with BENZ module or a Star/DAS dealer scanner.


Can monitor & log the relevant parameters with an Android phone or tab, a cheap OBD-II dongle and Torque Pro ($5)