Brand ngk part name glow plug part number 9970 technical specification resistance ohm 0 3 overall length mm 148 9 fitting depth mm 27 rated current a 7 voltage v 7 spanner size 8 0 mm material ceramic thread size m8 x 1 0 engine code om 651 913 port type pin this part fits with the following models mercedes a class w176 a 180 cdi 12 109 1796 mercedes a class w176 a 200 cdi 12 136 1796 mercedes a class w176 a 220 cdi 176 003 12 170 2143 merc