Chequered Flag I would not touch with a barge pole, and SSC are mostly a sales operation rather than service/repair.
S2Smarts really are your best bet - or you could try Mark Rogers (07768305590 / mm.motors2000@outlook.com) - he's in Essex but is mobile and may be able to come to you to carry out a service:
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2004 Roadster-Coupe SB2 Brabus
2005 ForTwo Brabus Numeric
2014 Skoda Yeti 4x4 DSG
ex 2002 City Coupe 600cc Pulse
ex 2003 City Coupe 700cc Passion
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