Program Memory, Remove and Install (X 16 SZ, 16 LZ2 and C 18 NZ)
 Remove, Disconnect Remove engine control unit - see operation "Engine Control Unit, Remove and Install".
 Disassemble Remove program memory cover (1) from engine control unit. Release program memory (2) and lift out.
 Important! Do not open program memory, do not touch plug contacts.
 Inspect Check plug contacts for damage. | 
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 Assemble Recesses in program memory and socket in engine control unit must align. Insert program memory - retaining clips must engage. Place program memory cover on engine control unit.
Important! When replacing engine control unit and reusing old program memory: transfer specifications (part no. and letter code) of removed engine control unit to sticker on Service engine control unit. For version with drive-off lock: activate new engine control unit with TECH1/TECH1A or TECH 2 for the "drive-off lock" function - see corresponding test instruction.
 Install, Connect Install engine control unit - see operation "Engine Control Unit, Remove and Install".
Inspect Carry out function check as specified in trouble-shooting programme.
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