This isn't rocket science! the injector on cyl 2 is stuck open and depleting all fuel pressure at the end of the rail which in turn causes misfire on the surrounding cylinders.

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600SEL '91
300E 4Matic '88
240D '83
280SE '77
350SE '73
The most complex systems can fail in the simplest way.
Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis.

i don't believe in the lord! He's never bought me a Mercedes Benz.