C350 Problems with Washing - Mercedes-Benz Forum

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post #1 of 11 (permalink) Old 04-20-2012, 09:04 AM Thread Starter
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C350 Problems with Washing

Hello,

I have a c350 and I can't wash it without the sensors locking and unlocking it multiple times.

Is there a way to put it into valet mode or some other temporary feature that will prevent the sensors from picking it up?
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post #2 of 11 (permalink) Old 04-20-2012, 09:12 AM
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Never heard this one before!

Is this a carwash or are you hand washing? Is this a Keyless Go model? We need a few more details before we start guessing here...
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post #3 of 11 (permalink) Old 04-20-2012, 09:17 AM Thread Starter
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Sorry!

It is a 2009 model and has keyless go. It happens when I wash it with a pressure washer. It makes sense when I hit the sensors on the door with the water but sometimes it happens when I wash the mirrors as well.

It is really sensitive and repeatedly locks and unlocks.

Thanks for your help.
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post #4 of 11 (permalink) Old 04-20-2012, 09:39 AM
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Aah - that explains it!

Do you have the Owner's Manual? If so there will be a warning under the Chapter about Washing a car with KEYLESS-GO, especially referring the the danger of Power washing that can cause the mis-operation of the door locks. So it is not a fault.

Try cutting down the pressure a tad...
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post #5 of 11 (permalink) Old 04-20-2012, 10:07 AM Thread Starter
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Thank you for your help!

Unfortunately every cash wash I've been to only has one pressure level: excessive. I guess I'll have to start breaking out the old sponge and bucket.
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post #6 of 11 (permalink) Old 04-20-2012, 01:08 PM
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I would definitely break out the old sponge & bucket. The pressure washers are too harsh. You might as well be sandblasting your car with some of them. Basically what you are doing is scouring the dirt off the paint with water pressure. Two buckets, one sponge. First bucket has soapy water (don't use dishwashing liquid) and second bucket has clean water. Dip the sponge in the soapy water and wash an area. Rinse in the clean water and then redip into soap. If clean water gets too dirty then change it out. Your paint will love you for it.
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post #7 of 11 (permalink) Old 04-21-2012, 03:45 AM
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I do not think the car has a real problem, just does not like pressure washing, however a quick diagnostic test for fault codes may help. When driving the car in heavy rain does it affect anything electronically controled??

ERIC.

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post #8 of 11 (permalink) Old 04-21-2012, 05:01 AM
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Eric - the OM specifally referred to models with KEYLESS-GO experiencing this problem.

Are their Central Locking sensors different to those of other cars?
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post #9 of 11 (permalink) Old 04-21-2012, 05:25 AM
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Quote:
Originally Posted by keyhole View Post
Eric - the OM specifally referred to models with KEYLESS-GO experiencing this problem.

Are their Central Locking sensors different to those of other cars?
Yes of course the sensors are different, to lock the car requires simple pressure on the handle. If you have the key in your pocket, then simply touch the inside of the handle, you do not need to pull the handle, and the car will unlock. To lock the car simply touch the outside of the door handle and it will lock.

If pressure washing the car, the simple answer is to keep the key well away from the car so the KG will be switched off.
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post #10 of 11 (permalink) Old 04-21-2012, 08:15 AM
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Quote:
Originally Posted by eric242340 View Post
If pressure washing the car, the simple answer is to keep the key well away from the car so the KG will be switched off.
There's your answer then, Griffer!
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