I have the instructions here for a 209 model but it is for CLK320 and I believe they are similar.
REMOVE/INSTALL FRONT DOOR LOCK
MODEL 209
1 Remove front door lining
2 Remove sidebag (3)Model 209.3 with sidebag
3 Remove speaker in front door
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4 Remove outside door handle on front door
5 Loosen rear rail on power window and fold down
6 Disconnect electrical connector (6) from left door control unit
(N69/1) and right door control unit (N69/2)Â
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7 Expose electrical lines (5) up to door lock (1)
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8 Unscrew bolt (2)
9 Take out door lock (1) through access opening
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10 Install in the reverse order
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11 Adjust play by loosening and tightening bolt (4) Left side:
right-hand thread.
Right side: left-hand thread.
12 Carry out function check
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Friday, December 30th, 2011 AT 7:02 PM