Tag: secondary

Mercedes CLS55 AMG W219, Replacing The Old SAI Hoses

Decided to replace the 2 old Secondary Air Injection (SAI) hoses on the front of the big V8 M113k engine. As I pulled them of, they started to deteriorate, so I was just in time. The SAI system helps the catalysts heat up faster in a cold start situation.

Partnr 1132381082
Partnr 1132381082
Old vs New SAI hose
Rubber bung under the SAI hose
New SAI hose in place
Old SAI hose (drivers side)
Old & new SAI hose (drivers side)
Result! Progress!
Just in time



Mercedes CLS55 AMG W219, New Exhaust Clamp Secondary Cats

New exhaust clamp for the secondary cats as the original one had a rusted bolt which could snap at anytime.