S 500 Coupe (140.070) V8-5.0L (119.970) (1995)
Shift Interlock Relay: Technical Service Bulletins
Engine - Will Not Crank, Blown Fuse
TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS
DATE: February 1995
REF. NO. MBNA 54/42
SUBJECT:
MODEL 140, AS OF 01/94 PRODUCTION
ENGINE WILL NOT CRANK (FUSE F3-16 BLOWN)
REWIRING VOLTAGE SUPPLY FOR STARTER LOCK-OUT RELAY MODULE (K38)
As of January 1994 production, the voltage supply for the starter lock-out relay module (K38) was changed from fuse F4-2 to F3-16. The front cigar
lighter (R3) is also powered by fuse F3-16.
If fuse F3-16 blows, the engine will not crank.
The practice of powering aftermarket electrical accessories from the front cigar lighter increases the likelihood of fuse F3-16 being blown.
Therefore, in circumstances where the voltage supply to K38 is interrupted by a blown fuse F3-16, rewire the voltage supply for K38 as per the
procedure described below.
Procedure
1. Disconnect and cover the battery negative terminal.
2. Remove fuse box F3 to expose wiring beneath (SMS, Job No. 54-1255).
3. Locate wire coupling position 21 (see ETM, Model 140, Vol. 1, 00-B.4 2, drawing B). Position 21 is a RD/VI wire, covered in black tubing, near
screw connection "D".
4. Remove the wiring connector from position 21 by sliding the red plastic locking clip over to the side (press near the letter "L" on fuse block) and
pulling the wire connector out. Slide locking clip back into locked position.
5. Locate wire coupling position 27, near screw connection "E".
6. Install the RD/VI wire from position 21 into position 27 by sliding the locking clip over to the side (press near the letter "M" on fuse block). Press
the wire connector into position and slide the locking clip back into locked position.
7. Reinstall fuse box F3, avoid damaging wiring (SMS, Job No. 54-1255).
8. Add "STARTER LOCK-OUT" to fuse position 19 of the fuse card using a permanent marker. Verify existence of a brown 7.5A fuse in position 19.
9. Reconnect battery negative terminal.
10. Recode radio and resynchronize power windows
11. Test function of K38 by starting engine.
In Case of Warranty
Operation: Starter lock-out relay module, rewire
Damage Code
Operation Number
Time (hrs.)
Model Indicator(s)
54157 73
54-2000
0.2
A0/B0