R230 Central Locking

[NAVITEL]

All was functioning properly with the central locking system until the onset of the cold snap. My SL350 was exposed to the elements for several days and became thoroughly frozen. Subsequently, when attempting to unlock with the key fob, there was no response. Utilised the emergency key to access the vehicle and successfully opened the trunk. The battery was inspected and deemed functional; however, it was charged overnight as a precaution. I suspected a fuse issue, so I removed the fuses related to the central locking system, but they were functioning well. The fuses for these boxes are situated in the engine compartment. Access to the fuses in the fuse box located behind the driver's seat is obstructed due to the central locking mechanism securing the lid of the cubby box. Upon use the key fob, the lights flash as though the vehicle is being locked or unlocked, and the alarm system is simultaneously engaged. Nonetheless, the doors remain unlocked, and the side mirrors do not retract.
Do you have any suggestions? Is there a method to access the cubby box located under the seat to get the fuses? Is there a control module that manages the locking and unlocking of doors?

[NAVITEL]

The varioroof has been inspected and is non-functional. The issue may be linked to the pump in the trunk. Is this fused, or is there a relay attached with it? If possible, please include the fuse/relay number and its position.

[nickoyster4]

The fuse is located behind the driver's seat.


The pump is likely irreparable. £1,000 for a new one. They typically become moist due to water intrusion in the trunk.

[NAVITEL]

I reconstructed and evaluated the pump approximately 12 months ago and encased it in plastic to ensure its dryness, so I anticipate it will be satisfactory. I am awaiting a slight improvement in the weather before commencing the disassembly, as it is quite cold in the North. I have observed that detaching the trim panels on the gearbox tunnel provides access to a mechanism for unlocking the locker lid. Is this accurate? I have detached the trim panel from the front of the locker; nevertheless, access is very limited. If the removal of the gearbox tunnel trim panel is indeed feasible, I will likely pursue that option. The vario roof is also inoperative, which I believe relies on a separate pump located atop the PSE pump. It appears unusual that both pumps have ceased functioning simultaneously, prompting me to consider a fuse or relay issue.

[DenishP4]

The SL63 AMG is stored for winter; nonetheless, I recall from the handbook that the roof and windows may deactivate in freezing conditions to prevent seal damage.


Or did I merely fabricate that in my mind?

[DenishP4]

The vacuum pump operates the locks and massage seats, while the hydraulic pump controls the roof and trunk.

[DenishP4]

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