DMF-TDDI?/plus symptoms?

UK. 51 reg. Ford Focus TDDI, 70,000 clicking/tapping noise when accerelator is pressed, getting louder. Garage suspects Dual mass flywheel, and qoutes
500 to strip gear box and replace. 1. Does the tDDI have a DMF-only reference on other sites says its on TDCI? 2. Is this a reasonable quote from garage? 3. Car had a replacement clutch + clutch server under warranty from similar noise-any comeback to Fords Warranty? -- Regards, Stu Devereux. Fax no. 08701339568 (Outside UK fax 448701339568) E-mail.
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