SL/R230: Trunk Actuator
Thread Starter
Junior Member
Joined: Jun 2021
Posts: 23
Likes: 2
From: Texas
2007 SL550
Trunk Actuator
Hey All,
On my 2007 SL550 the trunk won’t soft close unless i pull the actuator fuse (71, behind passenger seat), put it back in and everything works fine for few days and then again it stops.
i checked for leaks and didn’t detect anything (i sealed leaks about 2.5 years ago and it worked great until recently).
i have no error codes, anyone had this issue before and/or can suggest ideas before i drop 500$ on new actuator?
appreciate your advice!
On my 2007 SL550 the trunk won’t soft close unless i pull the actuator fuse (71, behind passenger seat), put it back in and everything works fine for few days and then again it stops.
i checked for leaks and didn’t detect anything (i sealed leaks about 2.5 years ago and it worked great until recently).
i have no error codes, anyone had this issue before and/or can suggest ideas before i drop 500$ on new actuator?
appreciate your advice!
MBWorld Fanatic!
Joined: Aug 2020
Posts: 1,322
Likes: 365
From: Gretna, NE
'03 SL55 Black, '03 SL500's Aegean, Mars Red, Tazanite, Alabaster, '11 S550 Flint Gray
If fuse 71 resets it, 99% chance it is a leak in the system. You should have a code in the PSE module. Are you scanning with Mercedes specific software that will find those codes? The trunk actuator is absolutely the most unreliable part of the car and I haven't seen any indication that the part was ever improved. I just recommend repairing it because the new one is going to fail in a few years anyway. I'm now using the superglue/baking soda repair and it seems to work better than other methods for me.
Thread Starter
Junior Member
Joined: Jun 2021
Posts: 23
Likes: 2
From: Texas
2007 SL550
If fuse 71 resets it, 99% chance it is a leak in the system. You should have a code in the PSE module. Are you scanning with Mercedes specific software that will find those codes? The trunk actuator is absolutely the most unreliable part of the car and I haven't seen any indication that the part was ever improved. I just recommend repairing it because the new one is going to fail in a few years anyway. I'm now using the superglue/baking soda repair and it seems to work better than other methods for me.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 1,232
Likes: 168
From: Glasgow, Scotland, UK
SL 350 R230 (3.7L with AMG Speedshift autobox)
Hey All,
On my 2007 SL550 the trunk won’t soft close unless i pull the actuator fuse (71, behind passenger seat), put it back in and everything works fine for few days and then again it stops.
i checked for leaks and didn’t detect anything (i sealed leaks about 2.5 years ago and it worked great until recently).
i have no error codes, anyone had this issue before and/or can suggest ideas before i drop 500$ on new actuator?
appreciate your advice!
On my 2007 SL550 the trunk won’t soft close unless i pull the actuator fuse (71, behind passenger seat), put it back in and everything works fine for few days and then again it stops.
i checked for leaks and didn’t detect anything (i sealed leaks about 2.5 years ago and it worked great until recently).
i have no error codes, anyone had this issue before and/or can suggest ideas before i drop 500$ on new actuator?
appreciate your advice!
