For those in staying in Melawati-Ampang area, if you know Suzi Corner, theres a car wash beside it.
What i like is that they uses microfibre cloth and quite accomodate if you ask them to be extra careful or want extra attention. Its just the below the MRR2 flyover, as you turn from Jln Ampang to Mrr2, its about 20-30 metres fron the junction. They also have nano coating done there at reasonable price. Happy washing !