Quote:
Originally Posted by DrSecretan
It's worth noting that the manual states that you should use "special convertible top cleaning agent" on the roof, and that after every three to five washes you should treat that top with "impregnating agent". Looks like it's available from BMW's online shop.
Not sure if I'm going to use the official BMW stuff on the roof or spring for something a bit more high-tech like Gtechniq's I1 Smart Fabric. Anyone got any thoughts?
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I treated my new M40i with Gtechniq I1 Smart Fabric v2 in April and only have to rinse the roof with clean water each time I wash the car. The water literally flies off the top. A light rub with a drying towel or chamois is all that is needed to dry off the remaining water.
Highly recommended.
