SLK-Class (R170) 1998-2003: SLK 200, SLK 230K, SLK 320

SLK/R170: 1999 SLK 230

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Old Jul 1, 2008 | 08:57 PM
  #1  
studio4's Avatar
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slk 230
1999 SLK 230

Got a 99 SLK 230 about three weeks ago. CHECK ENGINE LIGHT was on when I bought it.
HOT AIR BLEW OUT dash instead of AC.
Ran very rough...almost dying and NO POWER. Got good price on it...so took chance.
Here's what I've done so far....
1. Changed spark plugs (Bosche iridiums)
2. Changed air filter (K&N)
3. Replaced MAF sensor.
WOWOWOWOWOW...totally new ride...definately a little rocket ship with the tranny to "S".
4. Opened the duovalve, and cleaned it. Collant had penetrated all the way to the top of the coils. Cleaned a LOT OF build up/rust/deposits, re-installed everything.

Got cold AC for about 10 minutes...then warmer, warmer, HOTTTTTTT.
Okay, so the duavalve it bad---the coolant in the coils does a nice short trick
Ordered new one.

Here's the strange thing...started to get the coolant level light coming on...just once at first. Then went off. Checked coolant, proper level.
Temp gauge barely goes above 80.
Came on a second time, but went off within a minute.
Today on the way to work went on when I was going UP a hill, then shut off when I went down the same hill.

Air bubble because of the dual valve opening?
Also, how much coolant to add into the reservoir?

Thanks for the info...you folks are a plethora of info!!!!
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Old Jul 2, 2008 | 01:00 AM
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Buellwinkle's Avatar
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These cars require lots of coolant, almost to the top or the light comes on. Not like other cars.
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Old Jul 2, 2008 | 07:52 AM
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Coolant level AND washer level both co joined. Fill washers. Also the sensor in washer bottle shorts out.
And the coolant sensor also goes crook

Bazzle
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Old Jul 2, 2008 | 04:14 PM
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C300
how much did you pay for the 1999 slk and how many miles did it have? and what was the asking price?
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Old Jul 3, 2008 | 11:57 PM
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slk 230
Got it...

Filled the washer fluid up...problem resolved. Yet, found another issue---small hole in the washer tank. Hard to replace?

Paid $7500 (138k miles)...came with no acceleration, check engine light on, hot air blowing in the vents, wail in front left brakes, and a top that stuck up or down.
So far....bent the guide bar in the back, roof fixed. $59 MAF sensor, $35 K&N air filter, $50 of Iridium Bosch plugs, check engine light off.
Ordered new dual valve, front rotors (zimmerman cross drilled) Akenobo sp?) ceramic pads, with shipping $549.
Think I've done pretty good so far...and mpg is north of 24 in combo driving.
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