Whats up with those screen door style springs on the linkage....something just looks wrong there..... 
I'll bet its not starting from a fuel problem. Rarely do these cars just go from running fine to "lost power on freeway and died" sounds definatley fuel related. If compression is in question, perform a compression test and that will reveal the state of engine health.
Good luck! I hope you get it running!
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-diesel is not just a fuel, its a way of life- 
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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