Mercedes CLS550 Starter Relay Parts
Showing 6 out of 6 part(s) found in our catalog.
Brand
Keyword
Subcategory
Mon-Fri 8-4 MST/PST (Arizona Time)
Based on industry averages you can expect to pay between $3.49 and $23.29 for a Mercedes CLS550 starter relay.
Where Is The Mercedes CLS550 Starter Relay Located?
Pop open the hood and look over to the fuse and relay box on the passenger side, right by the firewall. That’s usually where the Mercedes CLS550 starter relay sits. You’ll see a plastic cover that snaps off. Flip it over—there’s almost always a diagram inside that shows which relay is which. Sometimes the layout shifts a bit from year to year, so if you’re not sure, a quick check in your owner’s manual can clear things up. Find the relay number in the diagram, match it to what’s in the box, and you’re set. Some people will swap in a relay from a less critical system for a quick test. Before unplugging anything, disconnect the battery. That’s non-negotiable with electrical work.
What Are The Symptoms Of A Bad Mercedes CLS550 Starter Relay?
When a Mercedes CLS550 starter relay starts to fail, you may catch strange behaviors. You might get a solid click when you turn the key, but the engine stays silent. Sometimes you’ll be left with no crank at all—just the dash lights and nothing else. Other times, the car might start after a few tries, but it gets less reliable each time. There could also be blown fuses or flickering interior lights right when you try to start up. Since these clues often line up with battery or starter problems, checking the starter relay can save a lot of guesswork.
How Do You Test The Mercedes CLS550 Starter Relay?
First, find the Mercedes CLS550 starter relay in the fuse box. Pull it out. Grab a multimeter and look for the pin diagram on the side of the relay or check your manual. With the key turned to “start,” you should hear a click and see continuity across the right terminals. If nothing happens, or the readings don’t add up, the relay may be done for. A quick way to double-check—swap it with the same relay from another circuit and see if the problem follows. Always confirm you have the right relay.
Can A Bad Mercedes CLS550 Starter Relay Drain The Battery?
Most of the time, a Mercedes CLS550 starter relay won’t drain your battery, but if it sticks closed, power can slip through when it shouldn’t. This can pull juice from the battery even when the car’s turned off. That slow drain leaves you stuck with a weak battery. Usually, battery drains have other causes, but if you’ve checked everything else, don’t count the starter relay out. Swapping in a working relay can clear up nagging battery issues.
Is It Easy To Replace The Mercedes CLS550 Starter Relay Yourself?
If you swap parts here and there, changing the Mercedes CLS550 starter relay is simple. Start by disconnecting the battery—always. Open the fuse box, yank the old relay, and push in the new one in the same spot and direction. Put the cover back, hook the battery back up, and try to start the engine. That’s pretty much it. You don’t need fancy tools and it’s usually a job you can finish in twenty minutes. Just grab a relay with the right part number and you’re good to go.
Looking For The Best Mercedes CLS550 Starter Relay Deals?
If your starter relay is acting up, you don’t have to break the bank to fix it. At AutohausAZ, we keep it simple: good prices, no junk, no surprises. We pick name-brand parts that meet Mercedes standards. Skip the stress—our inventory is easy to search and if you get stuck, our team is ready to give advice or help you place an order. Most parts ship the same or next business day out of Arizona, and we don’t make returns a hassle. Save real money, skip the dealer markup, and keep your CLS550 running smooth. Next time your starter relay needs a swap, give us a try.
