Until just recently MB suggested a minor repair for the "clicking" seat frames on the W210 chassis. Now they reccommend only replacement of the complete seat frame assembly$$$$$$.
MB part number 210-910-41-36 for the drivers side
MB number 210-910-42-36 on the passenger side.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator