Guide tube oil level dipstick 356A T1 315 mm. This guide tube is longer than the original guide tube to fit the later type 315 mm oil level dipstick. With the combination of these longer guide tube and the 315 oil level dipstick you still have the correct oil level in the engine. Use Oil level dipstick 616 07 070 fur this guide tube. This tube is NOT!! usable with the 225 mm oil level dipstick.