Congrats. The gassers do indeed last just as long, just need a little more maintenance. My 300E only has 163k but runs great....my dad's 420 has 302,000+ original miles on the engine, it had a head job about 90k ago I believe. Runs great.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 102k - mine - (OC-104,600)
'17 Metris(VITO!) - 26k - wifes (OC-25k)
'09 Sprinter 3500 Winnebago View - 57k (OC - 63k)
'13 ML350 Bluetec - 73k - dad's (OC-75k)
'01 SL500 - 92k(km) - dad's (OC-94,000km)
'16 E400 4matic Sedan - 122k - Brothers (OC-125k)