Link to radiator neck DIY kits: https://mercedessource.com/store/search?keys=radiator%20neck Plastic tank radiator upper neck failure is all too common. Some have lost engines due to rapid coolant loss and severe overheating.. Others have “lucked out” like I did in the case of the 1990 300SL. Can you believe the radiator neck fell off in my hands in my shop with I removed the neck hose clamp. In this video I will discuss the old kit I have available to reinforce the neck BEFORE it breaks as well as the new kit I sell to fix a broken neck like you will see in this video. No actual repair details are shown in this video. Just a quick overview of the problem with before and after pictures of the R129 radiator neck repaired.