Hi, long time lurker here but asking for help, now. I have a 2000 ML320 that has basically been trouble free. It has 89,000 miles and has suddenly started running really bad. No warning, it just happened. The CEL came on and the engine started running really rough, like it was not running on all six cylinders. I drove the car home and could only achieve about 40 mph in 2nd gear, floored. I hooked up a OBD-II reader and got P0100, P0110, P0300, 301, 302, 303 and 306. I replaced the MAF sensor. I cleared the codes and started the car again. Immediately got a P0302. I swapped the ignition coil from cyl 1 and cyl 2. I cleared the codes again and started the engine, P0301. I bought a new coil pack and replaced the one on cyl 1. No change, the car still runs bad. If I try to drive the car, I get P030* codes on just about all of the cylinders. Plugs are original but look clean and are gapped right. Wires are good. Right Cat was replaced about 8 months ago. I'm stumpped and looking for advise. Help please......