Even having driven in 52C weather in the Rajasthan desert here, I had no issues of the temp needle going over 81c, also no need for top up for the coolant, only every six months do I have to top it up and that too very little.

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99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT