I tried to disconnect MASS sensor today, no difference at all, now it does it on the driveway just couple minutes after starts. How about overvoltage relay, can i test anyhow with a voltmeter? Thank You very much!

After carefully reading you first post it sounds like an ignition coil , or whats called a spark plug connector is failing, when that happens the ecu shuts down the misfiring cylinders so your 6 is now a four cylinder, take it to a shop so they can run an engine smoothmess test and if its acting up it will show the dead,s cylinders, ive had my 94 e320 for 18 years and its very reliable and easy to dignose, lets us know what fixes it, a bad coil will cause shaking and with 2 cylinders down will be slow, you have 3 coils and 3 connectors

The coil finnaly shoed up. And after some swopping, of course it was whe last one. Interesting, now when she started to run normally, check engine popped up given me #7 code. Does anybody know what that means? Thank You!

ignition system faulty, i googled it and someone had a sheet