420SEL (126.035) V8-4.2L (116.965) (1986)
Engine Control Module: Customer Interest
Computers - Engine Surges Down Hills
07.3-87101
Engine Surges when Coasting or Driving
Engines 116.96,
10/87
Downhill
117.96, Model Year
1986/87
Remedy:
Install modified CIS-E control unit.
Engine
116.96, part no. 006 545 9432
117.96, part no. 006 545 96 32.