engine wash electrical problem w203 - 2000 - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 06-28-2011, 03:41 AM Thread Starter
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engine wash electrical problem w203 - 2000

HI after washing the engine of my W203 C Class 220 CDI year 2000 manual gear,
The engine does not start, what electrical problem could it be
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post #2 of 4 (permalink) Old 06-28-2011, 07:33 AM
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If you got the electronics wet, it could be a number of things, most not good. Does it make any sound? does it turn over? you have not stated any details.
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post #3 of 4 (permalink) Old 06-29-2011, 04:05 AM
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Originally Posted by herri View Post
HI after washing the engine of my W203 C Class 220 CDI year 2000 manual gear,
The engine does not start, what electrical problem could it be
I can't help you as this is mechanical/electrical problem not a detailing one.

This won't help the OP however, but will help anyone who is going to clean their engine bay-

Protection of Electrical Components

The most important electrical components are sealed to be ‘water resistant’, that is to say against low pressure, water splashing encountered in the course of daily driving conditions. As long as you avoid directing a strong stream of water (or a pressure washer at close range) directly into these components, you will be fine.

Note this doesn't include components like air intakes etc...

Avoid the [I cleaned engine and now it won't start] scenario by covering electrical / electronic and various other parts prior to using any cleaning products, sprays or water. It unsure either protect with a covering and /or use WD-40 water repellent

• Alternator
• Alarm Housing
• Intercooler
• Battery terminals (if not covered already)
• Induction kit cone (if you have one)
• Coil packs
• Electronic control units (ECU)
• On-Board Diagnostics (OBD) port
• Air intake systems (exposed air filters) can be covered with plastic wrap and a rubber band
• Avoid getting water in the spark plug recesses

Notes:1. This is not an exhaustive list, nor is it marque specific, if in doubt use a water repellent (WD-40) and exercise common sense
2. Use cling-film and then tin foil for the alternator, alarm housing etc as the foil is easier to mould and has greater protection properties. I suggest you use a plastic bag for the induction kit and just wrap it tight over the end to stop any water ingress.
3. For the intercooler the best way to cover is to get a flat sheet of cardboard and just cut it to size so it fits and covers the fins. Cardboard will normally protect the fins for the duration of the washing. It will get soaked so discard after the wash.
4. If you are uncertain of how to proceed on something not included here; talk with somebody who has marque /model /year specific knowledge.

~ Providing unbiased advice that Professional and Enthusiast Detailer’s Trust ~ TOGWT Blog - TOGWT Facebook Page
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post #4 of 4 (permalink) Old 09-28-2011, 06:34 PM
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For everyone deciding to pressure wash their engine bay the car needs to be running and avoidingdirect contact with alternators/coils/distributor/filter. I work at a body shop and we do roughly 5 cars a week. haven't had a problem in 2 years working there.
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