300SL (129.061) L6-3.0L (104.981) (1991)
Technical Service Bulletin # 20_008d
Date: 970201
Engine Block Heater - Installation/Cable Installation
REF. NO. MBNA 20/8D
DATE: February 1997 (supersedes S.l. MBNA 20/8C, April 1996)
TO: ALL MERCEDES-BENZ PASSENGER CAR DEALERS
Revision:
Subject "C" updated to include application for engine 603.971.
SUBJECT: SUBSEQUENT INSTALLATION OF ENGINE BLOCK HEATER
MODELS: 124, 126, 129, 201, 202, 210 (WITH ENGINES 103, 104)
MODELS: 129.066/067 (WITH ENGINE 119)
MODELS: 124, 126, 140 (WITH ENGINES 602.962, 603.970, 603.971)
Engine block heaters are now available for the above-listed models. The attached Work Instructions No. 247D detail the installation of the block heater,
and in the case of diesel models, the installation of the electrical cable and heat shield for the block heater.
Note:
Only owners of diesel models are entitled to free installation of electric cable and heat shield for a period of 12 months from original
date-of-delivery.
Models 124, 126, 129, 201, 202, 210 (With Engines 103, 104)
A. MODELS 124, 126, 129, 201, 202, 210 (WITH ENGINES 103, 104)
1.
Lift vehicle.
2.
Remove lower engine panel.
3.
Drain engine coolant by first attaching a 14 mm inner diameter, 1500 mm long hose to the drain plug in the engine block and then loosening the
plug. Drain coolant into a suitable container for reuse later.
Figure 1
4.
Remove core plug (arrow, Figure 1 rear-most plug) with a 22 mm 6 point socket insert.
5.
Install block heater (A, Figure 2) using rubber O-ring from the installation kit and not the alloy washer supplied. Tighten block heater using a 46
mm socket.
Tightening torque: 70 Nm