The iDrive unit like all these types of things just adjust's throttle response, namely how quickly the throttle reacts to your foot, it doesn't increase HP or fuel burn that is all done by your foot on the pedal, you will still burn fuel at the same rate as you drive down the road as if it is disconnected ......
The most important thing with being a new owner of a Grand is to change all fluids and filters so you know its been done, stamp in book only means the money has been paid and the book has been stamped, ensure the correct engine oil is used, a 5W40 of CJ4 rating, nothing less............ Change tranny oil/filters at least at 50K km especially if your going to tow.... ignore the tyre pressure label its way too low in psi.
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2015 WK2 CRD Laredo( ZG, WG 2.7 )
Your Never Too Old To Learn Something Stupid.
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