The 16V bottom end is identical to the 8V other than pistons & a beefed-up oil pan! Swap would require radiator & several other underhood parts, including the engine wiring harness & computer. NOT an easy job unless you have complete donor car to get parts from!

__________________
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