Hello all! I have purchased a non-running 1999 S320 with 177k miles (don't hate, please) in a non-running condition. The owner said the immobilizer was the issue and I tend to agree because the prongs on the black connector were "wonky"

I went to the salvage yard, and got an ECU, immobilizer, and the key ring from the ignition switch that connects to the immobilizer... from another S320 (1997 I believe). I sent the immobilizer and key to get programmed so that they sync. The guy provided a new key that matches the immobilizer and cut it so that it works in the ignition and door locks.

I've put the ECU, immobilizer and key ring thing into the car, and I'm still getting the Start Error message. But what's now happening is the alarm is going off (flashing lights).

Any idea on what happened? Why won't the car now start? I really appreciate the help with this one. I'm trying to keep these old W140's on the road (I have an S500 that I love) but this one has me baffled.

Thanks!!

I've run a CarSoft 7.4 scan on the car and received the following error messages:

ME – 1570 - CAN between IFZ and ME control unit (Engine 120: right)



ABS / ASR – Airbag – SRS Malfunction Indicator Lamp (A1e15)

Voltage supply low, Terminal 15R



BAS - C1012 Battery : Tension to high at Terminal 87

C1025 CAN – Communication

C1332 BAS – Solenoid Valve



Cluster – B1040 CAN Communication error with the Engine Control Unit

B1042 CAN – Communication error with the BAS Control Unit

B1471 Temperature Sensor External Temperature (short circuit to ground)

B1755 Serial Port K2 from the KLA/TAU panel with the instrument cluster : open circuit

B1473 Coolant level control switch S41 or clean water level switch S42 – open circuit



EGS –

F97 – 105 Error in the Anla8sper relays wiring

F113 – 116 Anla8sperr contact (ASK) without function

Gear box oil temperature sensor – defective

Telefon:

136 – Communication with KOMBI Instrument disturbed

148 – Selector Level blocked / converter lockup clutch (KUB)



PSE – B002 Central Locking : air demand excessive

F242

F87

B016 – Interior switch : Signal > 2 min.