Part #1170700055
Brand: Genuine Mercedes
A genuine Mercedes-Benz New Old Stock fuel injector insulator — no longer available from Mercedes-Benz or through official dealer channels. This is your last opportunity to source this part new.
The injector insulator (also referred to as the injector holder sleeve) sits between the fuel injector and the inlet manifold on M116 and M117 V8 engines fitted with Bosch K-Jetronic (CIS) mechanical fuel injection. It provides thermal and vibration isolation for the injector, preventing heat soak and ensuring correct injector seating.
No Longer Available (NLA): This part has been discontinued by Mercedes-Benz. Once current stock is gone, new genuine examples will not be available. If your originals are cracked, brittle or deteriorated, replace them now.
K-Jetronic (Bosch CIS) only — 1976 model year through approximately 1983.
This part is not compatible with KE-Jetronic (CIS-E) systems fitted to later M116 and M117 engines. Check your fuel system type before ordering.
W116 S-Class (1976–1980)
R107 / C107 SL & SLC (1976–1983)
W126 S-Class (1980–1983, K-Jetronic models only)
W126 / R107 note: From approximately 1983 onwards the W126 and R107 transitioned to KE-Jetronic. Verify your system type before ordering.
If replacing injector insulators, also inspect and replace the internal injector seal: