The difference in size between the two cameras:
No. 1=size 25*65mm Down Round Edge
No. 2=size 25*65mm Up Round Edge
No. 3=size 32*62mm Down Round Edge
No. 4=size 30*62mm Up round Edge

This product could fit all of the following models as expected:
Mercedes-Benz E-Klasse E-Class E320 2007 (choose No.1)
Mercedes-Benz E-Klasse T-model S211 Kombi (choose No.1)
Mercedes-Benz C-Klasse W203/Nur Kombi T-model-Touring (choose No.1)
Mercedes-Benz SLK R171 Cabriolet(Bj 2004-2011) (choose No.1)
Mercedes-Benz E-Klasse W211 Limo/W300 (choose No.1)
Mercedes-Benz C/CLS Klasse C219 W219/T-model S203/W203/W211/S211 Kombi Limousine (choose No.1)
Mercedes-Benz CLS Klasse CLS550/CLS300/320/350/500/E230/320CDI (Bj 2004-2011) (choose No.2)
Mercedes-Benz C-Klasse W203 Limo (choose No.3)
Mercedes-Benz C-Klasse W203 C240 4 matic 2004;W203/200 CDI Limousine (choose No.4)
Mercedes-Benz SL R230 Cabriolet (choose No.4)
Mercedes-Benz C-Klasse CL203 W203 Coupe (choose No.4)
Mercedes-Benz CLK W209/A209/C209 Cabrio (Bj 2004-2011) (choose No.4)
Chrysler Crossfire Roadster (choose No.4)

Note: This car rear view camera does not have distance guide lines by default
White jumper wire: Switch for distance guide lines (No/Yes)
If you need the distance guide line, please cut the white wire near the camera.

Product parameters:
- Image sensor: 1/3 inch color CCD
- Viewing angle: 160 degrees
- TV system: NTSC or PAL
- Effective pixels: 628x586 pixels
- Resolution: 520 TV lines
- Power supply: DC 12V
- Waterproof: IP67

Package contents:
1 x Rear View Camera
1 x power cable (1.5m)
1 x AV Cable (6m/19ft)
1 x User Manual