Hi Fridster,
there are no roo/nudge bars available for L494 unfortunately. (I would have one in a flash if there was). Roo bar is available for D5 , from ECB.
Regarding long range tank, I have not heard of one for L494. With the reduction in tank capacity from 105 litres to 86 litres (i think) when ad-blue was introduced with 2017 MY in Au, maybe you could retro fit a 105 litre tank? Other than that, maybe you could carry some extra on your caravan.
I towed a just-under 2t caravan for a while and it returned about 12l / 100km indicated (probably 13 actual) on my SDV6. by all accounts the v8 diesel gets about the same. These are a great tow car.
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