I have a gray market, sold in Germany, 1978 350SL with K-jetronic CIS fuel injection. At the back of the motor behind the fuel distributor there is a valve with air lines (not vacuum) attached. The EPC calls it a thrust augmentation valve. Does anyone know what it does and how it does it? I am replacing damaged hoses and would like to test it when done!

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1984 300CD (sold)
1973 220DPK 4 spd (died)
1978 350SL 4 spd gray market
2003 SLK32 AMG
1988 300CE (sold)
1997 E420 (Totaled)
1998 E320 Wagon