His car is HFM, not CIS, and idle, etc. can't be adjusted. HFM fuel injection systems are designed so that idle speed can't be adjusted. Idle speed is completely controlled electronically.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".