Mercedes S63 Fuel Pump Relay Parts
Showing 6 out of 6 part(s) found in our catalog.
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Based on industry averages you can expect to pay between $3.49 and $15.19 for a Mercedes S63 fuel pump relay.
Where Is The Mercedes S63 Fuel Pump Relay Located?
Finding the Mercedes S63 fuel pump relay can be a bit of a search, especially if you haven’t dug around the trunk before. In most S63 models, the relay hides behind a panel on the right side of the trunk, not far from the battery or the main fuse box. Some owners spot it close to the rear seat back. Mercedes likes to keep you guessing, so location may shift depending on model year. Pull up your owner’s manual or check a repair guide to pin it down. There’s usually a diagram on the trunk lid or inside the fuse panel cover. Sometimes, you need to pull back trunk carpet, or work loose a trim piece—take your time and don’t force anything. The clips holding panels can snap if you get rough.
What Are The Symptoms Of A Bad Mercedes S63 Fuel Pump Relay?
A dying Mercedes S63 fuel pump relay can throw you a curveball. You turn the key—engine cranks, but nothing else. Starter works, but no spark of life. Sometimes the car fires up but stutters as you drive, or just cuts out at random. Another clue: when you flip the ignition, you might not hear the usual hum of the fuel pump. Trouble lights on the dash, often tied to fuel or engine systems, can pop up too. These signs steer you toward the relay but testing is the only way to nail it down.
How Can I Test The Mercedes S63 Fuel Pump Relay?
Checking the Mercedes S63 fuel pump relay calls for a little detective work, but isn’t hard. With the trunk open, listen for a click from the relay as you turn the ignition on. If it's silent, pull out the relay and use a multimeter to test the relay contacts for power and ground. Some drivers use a jumper wire to bridge the relay’s terminals—if the pump kicks on, the relay is shot. Always turn off the ignition before unplugging anything. Don’t let metal touch other parts—one slip could hit a live wire and blow a fuse.
Can I Replace The Mercedes S63 Fuel Pump Relay Myself?
Yes, you can swap the Mercedes S63 fuel pump relay yourself, and you don’t need a full toolbox. Remove the fuse box cover in the trunk, pull the old relay, press in the new one. Before you start, take out the keys and keep the ignition off. Double-check the part number against your car’s specs—wrong relay means more headaches. The job goes fast, but take it slow around the connectors. Metal pins bend easy. Don’t force anything.
What Causes The Mercedes S63 Fuel Pump Relay To Fail?
Several things can take out the Mercedes S63 fuel pump relay. Just using the car—years of starts and stops—wears out the inner contacts. Cars driven on short trips see even more cycles and stress. Water leaks can drip into the trunk and eat away at connectors. Road salt, trunk spills, or even a missing weather seal can let in moisture that builds up corrosion. In rare cases, an electrical issue somewhere else makes the relay overheat and fizzle out. Track down moisture or wiring problems before you drop in a fresh relay, or you could be doing this job again.
Where Can You Find a Mercedes S63 Fuel Pump Relay Easily?
Hunting down a Mercedes S63 fuel pump relay shouldn’t be a hassle. AutohausAZ keeps it straightforward—discounted parts, quick deliveries, no drama if you need to return something. Their team gets your relay shipped out fast. You save money and get your car back on the road without a long wait.
