The car doesn't require any major modifications at the service area so fix what you can. Eccles is a night stage down claustrophobic country lanes lined with large hedgerows. Look out for the tree where the road splits left and right. Remember that you're going left and you don't really want to be hitting it. The secret to getting round the junctions is to turn extremely early and slide the car so that the bonnet is facing the exit of the turn. It's incredibly important on this stage as the junctions are nearly always square junctions and the fences and hedgerows don't allow much room for error.
Eccles is an easy stage and you should really be looking to win this one.