Nissan Note problems - what's the cheapest fix?

My 2008 Note recently had its annual service at a local Nissan garage, but I want to question two of their recommendations. The first problem is the lights on the dashboard behind the rev counter and speedo have gone, meaning I can't see how fast I am going if it is dark. Nissan have said that the only solution is to buy in a new 'dash cluster' from Japan, at a cost of £579. The second problem is that my key remote creates a screeching sound from the car when it locks, and occasionally the driver door won't open from inside. Nissan's answer to this is to replace the door lock system for £258. Are these the only options? They seem very expensive.
1st problem. That can be fixed by someone such as www.clusterrepairsuk.co.uk/ or www.cartronix.co.uk/ 2nd problem. The lock servos need lubricating. There may be an access hole on the door frame filled by a removable grommet through which WD40 can be sprayed.
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