Engine Block Heater - Electrical Cable Installation

86MERCEDES02
TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS


DATE: May 1986 REF.NO. MBNA 20/6

SUBJECT: INSTALLATION OF ELECTRICAL CABLE FOR ENGINE BLOCK HEATER MODEL 126.125


As of model year 1986, all diesel engines are equipped with a factory-installed block heater as standard equipment, however, the electrical cable is not installed. The attached Work Instructions, No. 188, detail the installation of the electrical cable.

A coupon entitling customers to free installation of the electrical cable can be found in the 1986 "Owner's Service and Warranty Policy" booklet.

No. 188
Date: May 1986 Grp. 20

Subject: INSTALLATION OF ELECTRICAL CABLE FOR ENGINE BLOCK HEATER MODEL 124


1. Raise the vehicle on a lift and remove the rear encapsulation panel below the engine compartment.

FIGURE 1 - BLOCK HEATER:

2. Attach electrical cable to block heater (1, Figure 1). Route cable away from exhaust manifold along transmission oil cooler line using plastic straps (2, Figure 1).

FIGURE 2 - ROUTING OF ELECTRICAL CABLE:

FIGURE 3 - CABLE ATTACHED TO ALTERNATOR HARNESS:

3. Continue routing the cable, using plastic straps, past the alternator cooling duct (arrow, Figure 2) and along the alternator wiring harness (arrow, Figure 3).

FIGURE 4 - VACUUM AMPLIFIER:

FIGURE 5 - EXPANSION TANK HOSE:

4. Route remainder of cable along vacuum lines of vacuum amplifier (arrow, Figure 4) and attach to radiator expansion tank hose (arrow, Figure 5).

5. Reinstall encapsulation panel below engine compartment.
Parts Information


Part Name Part Number


Electrical cable 201 540 31 34


Time Allowance

20-0941/57 Electrical cable for block heater, subsequent inst. 0.3 hrs.*
(with Maint. or Repair Work)

*Refer to latest Time Guide