ive been thinking about a timing chain in the next 3-4 months on my baby .
question? do the cams have to come out ? a mechanic told me that the book time is 13.5 hours and that removing the cams is a sure way not to be off a tooth in the timing
i can handle the hours stated but removing the cams??
is this normal?is it the better way? or is he tellin me stories?

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1992 500E silver
1990 300ce AMG
1993 500e smoke silver-sold
1992 500e sold pearl black-sold
1966 mustang converible 289
1969 camaro x11
1991 ZR-1
1972 corvette roadster
2000 dodge cummins 4x4 sold
1994 e320 sold
1987 560sec Brabus
1987 300E (my first benz)