Question about Mercedes-Benz M-Class
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Posted on Jan 02, 2017
SOURCE: 2.8l rd28t ohc 6cyl patrol
if only 3 plugs heat, probabilly one of the two pre-heat relays is defective ( or it's command ).
The relays are located left in the engin compartment, just in front of the battery and in the battery box. They should have green connectors.
If there is no fault found at the relays, but on their 'command', the pre-heat control box is located IN te vehicle under the steering column. ( Black plastic box with 4 screws, and a 16 or 20 position connector for engines with EGR )
Hope this explanation helps
Fabrice from belgium
Posted on Apr 02, 2009
2004 vw 2000sdi caddy van wont start some mornings you need to wind it over before it fires, immediately after it fires you can switch off ignition and it will start first time and continue to start all day. vw dealer says no fault codes present. gloplugs renewed, new battery,fuel problem? Has anyone come accross similar problem I
Posted on Aug 05, 2010
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