in a shop $500-700
yourself $120 plus about 5 hrs, 3 hrs if you have the special tool for guiding the chain.
Forgot to say if yours is the single chain 380 it is much more as it has to be converted to a double chain.
m

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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)