Mercedes S500 Starter Relay Parts
Showing 7 out of 7 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 S500 starter relay.
Where Is The Mercedes S500 Starter Relay Located?
You’ll find the Mercedes S500 starter relay in the main fuse and relay box in the engine bay, usually on the passenger side, close to the windshield. Pop the cover off and look at the diagram inside to spot the right relay. Relay placement can change by model year and market, so the owner’s manual is always worth checking. If nothing is labeled for the starter, a wiring diagram from Mercedes comes in handy. Some models even hide the relay together with other components, so always double-check before pulling parts or swapping anything out.
What Are The Signs Of A Bad Mercedes S500 Starter Relay?
When a starter relay in a Mercedes S500 starts to fail, you’ll probably notice a few things. Sometimes, you turn the key and just get one click—no crank, nothing. Other times, you might hear silence when you try to start the car, with normal lights on the dash. Occasionally, it works fine at random, then leaves you stranded without warning. You may see lights flicker, or lose power to accessories while starting, which can also mean relay trouble. That said, always check your battery and connections first—relays aren’t always the root cause.
How Do You Test A Mercedes S500 Starter Relay?
To test the Mercedes S500 starter relay, disconnect the battery’s negative cable to play it safe. Pull out the relay after you’ve found it. Grab a multimeter and check the terminals for continuity, following the pin diagram or manual. Put 12 volts across the relay coil—if it’s good, you’ll hear it click and see continuity at the switch terminals. No click or no continuity points to a bad relay. You can also swap in another relay with the same pinout from the box. If the car cranks with the new relay, you’ve found your problem.
Can A Bad Mercedes S500 Starter Relay Drain The Battery?
Most of the time, a bad starter relay on a Mercedes S500 won’t drain the battery by itself. That said, if the relay sticks and the starter motor keeps running, your battery can go dead fast and you can even damage the starter. Sometimes, a faulty relay leaves other circuits powered when they shouldn’t be, which wears the battery down over days. Even repeated start attempts from relay trouble can flatten a battery in a hurry. Don’t let it drag on—sorting the relay out early spares a lot of headaches.
How Much Does It Cost To Replace A Mercedes S500 Starter Relay?
Swapping the Mercedes S500 starter relay is easy on the budget as repairs go. The part itself usually falls between $20 to $100, whether you choose Mercedes original or an aftermarket option. Labor isn’t much—shops often charge less than an hour, so expect under $100 for the work. If you’re handy, you can handle it yourself with a socket or two. Total outlay is almost always below $200. It’s one of the cheaper fixes for starter problems, and a good first step before bigger repairs.
Looking For The Best Mercedes S500 Starter Relay Deal?
Shopping for a Mercedes S500 starter relay doesn’t need to turn into a hassle. At AutohausAZ, we do our best to make sure the process is straightforward and the price stays fair. Our direct relationships with top suppliers help us drop the markup and pass the deals to you. Shipping moves fast, so you’re not left waiting to get your vehicle back up and running. If you ever need a return, we keep it simple—no complicated hoops or endless emails. We know what it’s like dealing with car problems, and we want to help you get the job done without extra stress. Try us out when you need an S500 starter relay, and see if we can help make your next repair just a little bit easier.
