MTPLMMaximum Technically Permissible Laden Mass (full automobile)
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For the ideal towing balance, your caravan's maximum technically permissible laden mass (MTPLM) should equate to 85 per cent of your car's kerb weight.
Remember that the towed weight is the actual laden weight (ALW) that the car is asked to pull (ie empty weight of caravan, plus what you add), and not the theoretical maximum authorised (MAW)' or, from 1999 production models, maximum technically permissible laden mass (MTPLM).
Maximum Technically Permissible Laden Mass (MTPLM) ( this is the heaviest total weight the caravan maker will permit and it's the sum of the MIRO and the Total User Payload.