The tubular guide of the oil level indicator is sealed in the cylinder block with a rubber ring. In the event of an oil leak at the seal, replace this ring.
You will need: key «on 10» (more comfortable socket head), screwdriver.
1. Turn out bolts of top...
2.... and the lower rail mounts.
3. Prying the guide with a screwdriver, remove it from the hole in the cylinder block...
4.... and remove from the vehicle.
5. Remove the O-ring from the guide. Lubricate the new ring with engine oil before installing.
6. Install the sealing ring on the oil level indicator guide, and the guide on the cylinder block in the reverse order of removal.