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post #1 of 5 (permalink) Old 01-31-2009, 02:41 PM Thread Starter
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New MB owner

Hi All,

I have just bought a 1999 ML320, it is the sort of car I dreamed of owning someday and am very pleased. Its very pleasant to drive, the gearbox is so smooth and we can get our 3 kids and the dog and a pushchair all in with room to spare. My Mrs has treated me to an AMG track day at our local MB World in Surrey, so will keep you posted about that when I get round to taking it.........................
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post #2 of 5 (permalink) Old 01-31-2009, 02:42 PM
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post #3 of 5 (permalink) Old 01-31-2009, 02:53 PM Thread Starter
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Date registered: Jan 2009
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Thankyou, as is probably common with most new members I have a question about my new ride. Since acquiring my ML the exterior temperature display and now the clock have disappeared. When the light shines on the temp and clock diplay at a certain angle I can see that there are figures there so I reckon it's just the bulbs, can anyone tell me which bulbs are required as its a minefield looking at autobulb websites. Also, the coolant temperature gauge was going up and down like crazy for a bit and now it has stopped working completely. I want to check the sensor but I don't know where to look in the engine for it. Any help you can offer would be massively appreciated, even letting me know the best place on Benz World to post my questions.
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post #4 of 5 (permalink) Old 01-31-2009, 03:50 PM
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Welcome to the Mercedes world
I got bad news for you, the problem you are having is very common in all mercedes benz models builts prior to2003, it's a defective instrument cluster that has to be changed completely, unfortunatly you can't change just a bulb to fix it.
you got 2 choices: either you buy a new one for $1200 without labor. Or fix your old one (there is a company on e-bay that fix these kind of things for about $250, but you need to check with them first.
I hope this information was helpfull for you.
eBay Motors: Mercedes S, CL Class Instrument Cluster Repair Service (item 330304138389 end time Feb-08-09 06:14:56 PST)
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post #5 of 5 (permalink) Old 02-04-2009, 08:11 AM Thread Starter
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OK, I went down to Mercedes Benz World in Surrey, UK and got some free advice. They said that it sounds like the coolant temperature sensor may just be unplugged or defective. This would explain the temp. gauge not working, and also sometimes the car is difficult to start when hot. If the sensor is defective, then every time it starts as if the engine is cold so supplies maximum fuel. On an actual cold start this is fine, but when the engine is already hot, the sensor isn't sending the right temp. signal and it doesn't need max fuel so it floods, then after 5 minutes or so the fuel evaporates and it starts. I have been having this problem since about the same time the temp. gauge went offline.
Unfortunately the MBWorld guy didn't tell me exactly where to look for the sensor, just that it's near the water pump somewhere. Well, when I looked at the engine block I haven't a clue what I am looking at or for so can anybody help with a diagram of where the engine coolant temperature sensor is located on a 1999 ML 320?
I must say that the man I spoke to at MB World was very helpful in telling me it was a simple enough job to change the sensor myself rather than pay them £ 100 + VAT for the pleasure. I even got a cup of tea out of it. I think I would like to try this first rather than condemn the instrument cluster. By the way, I bought 5 replacement dash lights for £ 10.00, changed the 2 that had gone for the exterior temp and clock and they all work fine now.
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