According to the factory specifications. Perfect match for the car. Easy installation. Stable characteristics, high reliability. Name: Intake Manifold Runner Connecting Rods Kit Fit: For W164 W166 W211 W212 W221 W639 ML 320 OM642 3.0 3.2 CDI Part Number: 642 090 32 37, 642 090 50 37, 642 090 54 37, 642 090 77 37 For 6420903237 For 6420905037 For 6420905437 For 6420907737 For A6420903237 For A6420905037 For A6420905437 For A6420907737 Fit For the Following OM642 / OM642M - ENGINES: 3.0 3.2 CDI / V6 For W164 ML For W166 ML For X164 For X166 For W211 E For W212 E For W207 E For W251 R For 216 For W221 S For W639 For SPRINTER 906 W906 For W219C For W209 CLK For Grand WK / WH For Commander XK / XH For C320 / C350 CDI For E280 / E320 CDI/BlueTEC For R320 / R350 CDI/BlueTEC For ML320 / ML350 CDI/BlueTEC For GL320 / GL350 CDI/BlueTEC For 300C Colour:silver Material:Plastic + Metal Package Contents: 2x aluminum rods (for left and right intake manifolds) 6x anti-friction adapters (contribute to easy slip. protect from wear and tear) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.