Mercedes CLS500 Auxiliary Water Pump Parts
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The average cost of a Mercedes CLS500 auxiliary water pump is between $75.99 and $161.99.
What Is The Purpose Of The Mercedes CLS500 Auxiliary Water Pump?
The Mercedes CLS500 auxiliary water pump keeps hot coolant moving through the heater core, especially when the car is idling or moving slowly. Without it, you’d sit in a cold cabin on frosty mornings. The main goal here is comfort—steady heat, clear windows, and a warm cabin, no matter what your speed. It fills the gap left by the main water pump at low RPMs, letting the heat system keep working. If this pump fails, you’ll likely notice weaker heat or windows that fog up and stay that way.
What Are Common Symptoms Of Failure In The Mercedes CLS500 Auxiliary Water Pump?
If your Mercedes CLS500 auxiliary water pump isn’t doing its job, you’ll probably feel it before you see it. The air stays cold when you’re not moving, or you might hear a strange, soft whine from under the hood. Sometimes there’s a wet spot under your car or even a slow drip of coolant at the pump itself. In some cases, the HVAC just runs lukewarm, never really heating you up. You could also catch a warning light or fault code about coolant flow. Most of the time, you’ll start to wonder why your Mercedes doesn’t feel quite as luxurious as it usually does.
How Difficult Is It To Replace The Mercedes CLS500 Auxiliary Water Pump?
Swapping out the Mercedes CLS500 auxiliary water pump isn’t the toughest job, but it’s not a walk in the park either. You’ll have to pull back some plastic covers or hoses to reach it, usually somewhere tight near the firewall. You’ll want a good grip and a little patience. Make sure you're prepared for some stray coolant—clamps and a bucket come in handy here. Once the new pump’s in, you’ll need to refill the coolant and bleed the system. For those used to DIY projects, it’s a two-hour sort of task. If you’re not so handy, a shop can make it painless.
Does A Faulty Mercedes CLS500 Auxiliary Water Pump Cause Overheating?
The main water pump keeps your engine cool, not the auxiliary water pump. If this part goes bad, your engine will stay safe so long as your coolant isn’t leaking out. But if a leak does start around the auxiliary pump, you should watch your coolant level. Raindrops on the windows, lukewarm air, or poor defrosting are more likely than any overheating with this failure. Look after the problem early, and you’ll keep both your comfort and engine in check.
What Is The Usual Lifespan Of A Mercedes CLS500 Auxiliary Water Pump?
Most Mercedes CLS500 auxiliary water pumps stick around for 70,000 to 100,000 miles. Some wear out sooner, sometimes because the coolant is getting old or wires start to corrode. On occasion, you'll catch a failure even earlier—especially if there's been a leak elsewhere in the system. Checking the pump now and then for drips, noises, or weak heat saves headaches during the winter. Since the part isn’t too expensive, some folks swap it while working on other cooling system jobs, just to be safe.
Looking For The Best Deal On A Mercedes CLS500 Auxiliary Water Pump?
With AutohausAZ, you don’t need to search far and wide to keep your Mercedes CLS500 running well. We offer fair prices and a wide selection, making it easy to find what fits your car. Shipping moves quickly, so you’re not left waiting long. If something isn’t right, returns are easy to handle. We aim to make every step of the process simple, from browsing to checkout, so you can get your car fixed and back on the road as soon as possible. Need a hand or have a question? Our team is here to help you get what you need, with no hassle. We focus on the details so you can enjoy the drive.
