Last winter the starter in my '05.5 Jetta tdi would sometimes not engage the flywheel. I replaced the battery and the starter, but no improvement. It is starting to do it again - it is engaging still but is noisy, like it is barely engaging. I checked the voltage to the solenoid and it is 5.5. Shouldn't this be 12? I'm no expert, but wouldn't this cause my problems? Could this be a bad relay - J682? I see 2 part #s, 3D0951253A($4.63) by Vemo and 7N0951253($42.08) OEM at ECS tuning. What do you think?